I have configured a 3 node nifi cluster and I have my authorizers.xml file is as below on all the 3 nodes ``` <authorizer> <identifier>file-provider</identifier> <class>org.apache.nifi.authorization.FileAuthorizer</class> <property name="Authorizations File">./conf/authorizations.xml</property> <property name="Users File">./conf/users.xml</property> <property name="Initial Admin Identity">CN=chakri, OU=NIFI</property> <property name="Legacy Authorized Users File"></property> <property name="Node Identity 1">CN=nifi-1,OU=NIFI</property> <property name="Node Identity 2">CN=nifi-2,OU=NIFI</property> <property name="Node Identity 3">CN=nifi-3,OU=NIFI</property> </authorizer> </authorizers> ```   ``` <accessPolicyProvider> <identifier>file-access-policy-provider</identifier> <class>org.apache.nifi.authorization.FileAccessPolicyProvider</class> <property name="User Group Provider">file-user-group-provider</property> <property name="Authorizations File">./conf/authorizations.xml</property> <property name="Initial Admin Identity">CN=chakri, OU=NIFI</property> <property name="Legacy Authorized Users File"></property> <property name="Node Identity 1">CN=nifi-1,OU=NIFI</property> <property name="Node Identity 2">CN=nifi-2,OU=NIFI</property> <property name="Node Identity 3">CN=nifi-3,OU=NIFI</property> <property name="Node Group"></property> </accessPolicyProvider> ```   ``` <userGroupProvider> <identifier>file-user-group-provider</identifier> <class>org.apache.nifi.authorization.FileUserGroupProvider</class> <property name="Users File">./conf/users.xml</property> <property name="Legacy Authorized Users File"></property> <property name="Initial User Identity 1">CN=chakri, OU=NIFI</property> <property name="Initial User Identity 2">CN=nifi-1,OU=NIFI</property> <property name="Initial User Identity 3">CN=nifi-2,OU=NIFI</property> <property name="Initial User Identity 4">CN=nifi-3,OU=NIFI</property> </userGroupProvider> ``` if i try to access the ui a message is displayed as below Unknown user with identity 'CN=chakri, OU=NIFI'. Contact the system administrator. I also flound a log from nifi-user.log as below 2021-05-25 09:33:08,980 INFO [NiFi Web Server-18] o.a.n.w.a.c.AccessDeniedExceptionMapper identity[CN=chakri, OU=NIFI], groups[] does not have permission to access the requested resource. Unknown user with identity 'CN=chakri, OU=NIFI'. Returning Forbidden response. ... View more