更新：校验sysuser存在时，执行更新。

ruoyi-framework/src/main/java/com/ruoyi/framework/web/service/SsoService.java

@@ -493,12 +493,18 @@ public class SsoService {
             sysUser.setDeptId(deptId);
         }
 
-        sysUserService.insertUser(sysUser);
+        SysUser checkUser = sysUserService.selectUserById(sysUser.getUserId());
+        if (checkUser != null) {
+            sysUserService.updateUser(sysUser);
+        } else {
+            sysUserService.insertUser(sysUser);
+        }
 
         //添加权限
         JSONArray roles = userJson.getJSONArray("roles");
         if (CollectionUtils.isNotEmpty(roles) && roles.size() != 0) {
             List<SysUserRole> list = new ArrayList<>();
+            sysUserRoleMapper.deleteUserRoleByUserId(sysUser.getUserId());
             for (int i = 0; i < roles.size(); i++) {
                 JSONObject json = roles.getJSONObject(i);
                 SysUserRole sysUserRole = new SysUserRole();