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It resolves the session, calls ",[510,680,515],{},", captures timing into ",[510,683,684],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[687,688,311],"h2",{"id":689},"options",[507,691,692,693,700],{},"Inherits all ",[694,695,697,699],"a",{"href":696},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[510,698,515],{}," options",", plus:",[702,703,704,723],"table",{},[705,706,707],"thead",{},[708,709,710,714,717,720],"tr",{},[711,712,713],"th",{},"Option",[711,715,716],{},"Type",[711,718,719],{},"Default",[711,721,722],{},"Description",[724,725,726,747,766,785],"tbody",{},[708,727,728,734,739,744],{},[729,730,731],"td",{},[510,732,733],{},"exclude",[729,735,736],{},[510,737,738],{},"string[]",[729,740,741],{},[510,742,743],{},"['\u002Fapi\u002Fauth\u002F**']",[729,745,746],{},"Route patterns to skip (glob).",[708,748,749,754,758,763],{},[729,750,751],{},[510,752,753],{},"include",[729,755,756],{},[510,757,738],{},[729,759,760],{},[510,761,762],{},"undefined",[729,764,765],{},"If set, only matching routes are resolved.",[708,767,768,773,778,782],{},[729,769,770],{},[510,771,772],{},"onIdentify",[729,774,775],{},[510,776,777],{},"(log, session) => void",[729,779,780],{},[510,781,762],{},[729,783,784],{},"Called after successful identification.",[708,786,787,792,797,801],{},[729,788,789],{},[510,790,791],{},"onAnonymous",[729,793,794],{},[510,795,796],{},"(log) => void",[729,798,799],{},[510,800,762],{},[729,802,803],{},"Called when no session is found.",[687,805,807],{"id":806},"route-filtering","Route Filtering",[507,809,810],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[518,812,814],{"className":520,"code":813,"language":523,"meta":524,"style":524},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[510,815,816,832,841,856,869,883,890],{"__ignoreMap":524},[528,817,818,820,822,824,826,828,830],{"class":530,"line":531},[528,819,573],{"class":572},[528,821,576],{"class":542},[528,823,579],{"class":538},[528,825,543],{"class":582},[528,827,585],{"class":542},[528,829,588],{"class":538},[528,831,591],{"class":538},[528,833,834,836,838],{"class":530,"line":562},[528,835,598],{"class":597},[528,837,601],{"class":538},[528,839,840],{"class":542}," [\n",[528,842,843,846,848,850,852],{"class":530,"line":569},[528,844,845],{"class":538},"    '",[528,847,610],{"class":555},[528,849,607],{"class":538},[528,851,588],{"class":538},[528,853,855],{"class":854},"sHwdD","     \u002F\u002F Better Auth itself\n",[528,857,858,860,862,864,866],{"class":530,"line":594},[528,859,845],{"class":538},[528,861,619],{"class":555},[528,863,607],{"class":538},[528,865,588],{"class":538},[528,867,868],{"class":854},"   \u002F\u002F Public endpoints\n",[528,870,871,873,876,878,880],{"class":530,"line":630},[528,872,845],{"class":538},[528,874,875],{"class":555},"\u002Fapi\u002Fhealth",[528,877,607],{"class":538},[528,879,588],{"class":538},[528,881,882],{"class":854},"      \u002F\u002F Health checks\n",[528,884,885,888],{"class":530,"line":651},[528,886,887],{"class":542},"  ]",[528,889,627],{"class":538},[528,891,892,894],{"class":530,"line":665},[528,893,668],{"class":538},[528,895,671],{"class":542},[507,897,898],{},"For high-traffic apps, flip the model — only resolve sessions on routes that need them:",[518,900,902],{"className":520,"code":901,"language":523,"meta":524,"style":524},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[510,903,904,920,948],{"__ignoreMap":524},[528,905,906,908,910,912,914,916,918],{"class":530,"line":531},[528,907,573],{"class":572},[528,909,576],{"class":542},[528,911,579],{"class":538},[528,913,543],{"class":582},[528,915,585],{"class":542},[528,917,588],{"class":538},[528,919,591],{"class":538},[528,921,922,924,926,928,930,933,935,937,939,942,944,946],{"class":530,"line":562},[528,923,633],{"class":597},[528,925,601],{"class":538},[528,927,604],{"class":542},[528,929,607],{"class":538},[528,931,932],{"class":555},"\u002Fapi\u002Fdashboard\u002F**",[528,934,607],{"class":538},[528,936,588],{"class":538},[528,938,552],{"class":538},[528,940,941],{"class":555},"\u002Fapi\u002Faccount\u002F**",[528,943,607],{"class":538},[528,945,624],{"class":542},[528,947,627],{"class":538},[528,949,950,952],{"class":530,"line":569},[528,951,668],{"class":538},[528,953,671],{"class":542},[507,955,956,958,959,961,962,965,966,969,970,972,973,975],{},[510,957,753],{}," and ",[510,960,733],{}," use glob patterns (",[510,963,964],{},"*",", ",[510,967,968],{},"**","). Provide both if you need granular control — ",[510,971,733],{}," wins over ",[510,974,753],{},".",[687,977,979],{"id":978},"lifecycle-hooks","Lifecycle Hooks",[507,981,982,983,985],{},"Use ",[510,984,772],{}," to react to user identification — for example, force-keep logs for premium users via tail sampling:",[518,987,989],{"className":520,"code":988,"filename":522,"language":523,"meta":524,"style":524},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[510,990,991,1007,1034,1070,1097,1102,1107,1124,1149,1154],{"__ignoreMap":524},[528,992,993,995,997,999,1001,1003,1005],{"class":530,"line":531},[528,994,573],{"class":572},[528,996,576],{"class":542},[528,998,579],{"class":538},[528,1000,543],{"class":582},[528,1002,585],{"class":542},[528,1004,588],{"class":538},[528,1006,591],{"class":538},[528,1008,1009,1012,1014,1017,1021,1023,1026,1029,1032],{"class":530,"line":562},[528,1010,1011],{"class":582},"  onIdentify",[528,1013,601],{"class":538},[528,1015,1016],{"class":538}," (",[528,1018,1020],{"class":1019},"sHdIc","log",[528,1022,588],{"class":538},[528,1024,1025],{"class":1019}," session",[528,1027,1028],{"class":538},")",[528,1030,1031],{"class":572}," =>",[528,1033,591],{"class":538},[528,1035,1036,1039,1041,1044,1046,1049,1051,1054,1057,1059,1062,1064,1067],{"class":530,"line":569},[528,1037,1038],{"class":534},"    if",[528,1040,1016],{"class":597},[528,1042,1043],{"class":542},"session",[528,1045,975],{"class":538},[528,1047,1048],{"class":542},"user",[528,1050,975],{"class":538},[528,1052,1053],{"class":542},"plan",[528,1055,1056],{"class":538}," ===",[528,1058,552],{"class":538},[528,1060,1061],{"class":555},"enterprise",[528,1063,607],{"class":538},[528,1065,1066],{"class":597},") ",[528,1068,1069],{"class":538},"{\n",[528,1071,1072,1075,1077,1080,1083,1086,1089,1091,1093,1095],{"class":530,"line":594},[528,1073,1074],{"class":542},"      log",[528,1076,975],{"class":538},[528,1078,1079],{"class":582},"set",[528,1081,1082],{"class":597},"(",[528,1084,1085],{"class":538},"{",[528,1087,1088],{"class":597}," _forceKeep",[528,1090,601],{"class":538},[528,1092,660],{"class":659},[528,1094,546],{"class":538},[528,1096,671],{"class":597},[528,1098,1099],{"class":530,"line":630},[528,1100,1101],{"class":538},"    }\n",[528,1103,1104],{"class":530,"line":651},[528,1105,1106],{"class":538},"  },\n",[528,1108,1109,1112,1114,1116,1118,1120,1122],{"class":530,"line":665},[528,1110,1111],{"class":582},"  onAnonymous",[528,1113,601],{"class":538},[528,1115,1016],{"class":538},[528,1117,1020],{"class":1019},[528,1119,1028],{"class":538},[528,1121,1031],{"class":572},[528,1123,591],{"class":538},[528,1125,1127,1130,1132,1134,1136,1138,1141,1143,1145,1147],{"class":530,"line":1126},8,[528,1128,1129],{"class":542},"    log",[528,1131,975],{"class":538},[528,1133,1079],{"class":582},[528,1135,1082],{"class":597},[528,1137,1085],{"class":538},[528,1139,1140],{"class":597}," anonymous",[528,1142,601],{"class":538},[528,1144,660],{"class":659},[528,1146,546],{"class":538},[528,1148,671],{"class":597},[528,1150,1152],{"class":530,"line":1151},9,[528,1153,1106],{"class":538},[528,1155,1157,1159],{"class":530,"line":1156},10,[528,1158,668],{"class":538},[528,1160,671],{"class":542},[507,1162,1163,1164,1166,1167,1169,1170,1172],{},"Hooks fire after the session is resolved and ",[510,1165,515],{}," has set its fields. They run on every request that passes the ",[510,1168,753],{},"\u002F",[510,1171,733],{}," filter, so keep them fast and side-effect-free.",[1174,1175,1176,1181],"tip",{},[507,1177,1178,1179,601],{},"Common patterns for ",[510,1180,772],{},[1182,1183,1184,1188,1191],"ul",{},[1185,1186,1187],"li",{},"Force-keep audit logs for admins or high-value plans.",[1185,1189,1190],{},"Tag the request with feature flags or tenant info loaded from the session.",[1185,1192,1193],{},"Increment a per-user counter for billing.",[687,1195,1197],{"id":1196},"error-handling","Error Handling",[507,1199,1200,1201,1204,1205,958,1207,1210],{},"The middleware catches every error from ",[510,1202,1203],{},"getSession"," and logs nothing — your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[510,1206,684],{},[510,1208,1209],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1212,1213,1214],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":524,"searchDepth":562,"depth":562,"links":1216},[1217,1218,1219,1220],{"id":689,"depth":562,"text":311},{"id":806,"depth":562,"text":807},{"id":978,"depth":562,"text":979},{"id":1196,"depth":562,"text":1197},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1224,1227],{"label":335,"icon":338,"to":336,"color":1225,"variant":1226},"neutral","subtle",{"label":349,"icon":102,"to":350,"color":1225,"variant":1226},{},{"title":340,"icon":343},{"title":502,"description":1221},"jrR5gM4N47j96nisEwXGF_GTGeo8G3av0oISM0JNjLA",[1233,1235],{"title":335,"path":336,"stem":337,"description":1234,"icon":338,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":345,"path":346,"stem":347,"description":1236,"icon":295,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1785016744465]