Unable to do ssh from normal user due to the error " none of user's groups are listed in AllowGroups"

Issue

• Unable to do ssh, since users are not the part of AllowGroups in ssh configuration file.

Dec 20 15:00:24 TESTLABMACHINE1 usermod[628119]: add 'user1' to group 'wheel'
Dec 20 15:00:24 TESTLABMACHINE1 usermod[628119]: add 'user1' to shadow group 'wheel'
Dec 20 15:00:40 TESTLABMACHINE1 usermod[628171]: add 'user2' to group 'wheel'
Dec 20 15:00:40 TESTLABMACHINE1 usermod[628171]: add 'user2' to shadow group 'wheel'
Dec 20 15:03:03 TESTLABMACHINE1 sshd[628621]: User user1 from 10.x.x.xxx not allowed because none of user's groups are listed in AllowGroups
Dec 20 15:03:09 TESTLABMACHINE1 sshd[628621]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=10.45.9.251  user=user1
Dec 20 15:03:11 TESTLABMACHINE1 sshd[628621]: Failed password for invalid user user1 from 10.x.x.x port 57474 ssh2
Dec 20 15:03:21 TESTLABMACHINE1 sshd[628621]: error: Received disconnect from 10.4 port 57474:13: Unable to authenticate [preauth]