<Realm className="org.apache.catalina.realm.DataSourceRealm" dataSourceName="jdbc/startup"
userTable="users" userNameCol="user_name" userCredCol="user_password" userRoleTable="user_roles" roleNameCol="role_name" /> </Realm>
i wanted to authenticate user by email instead of username while there is no any option of email in tomcat 9 realm.
i tried to let my users login by email, but there is no functionality in j_security_check.
