Quay config app LDAP part should validate UID field

Description:
This is an enhancement request for Quay config-app, for the LDAP section, config-app tool should validate the UID field, as currently this field will be the quay username, for example if customers want to use their email as the quay username, then this field should be set as email, or for Microsoft AD this field should be set as sAMAccountName.
Suggest maybe we can provide the dropdown list to let customers select which LDAP they're using, then provide responding validation or clear that in the quay docs.
Pls review this enhancement.

Steps:
1. Launch Quay config app
2. Choose the internal authentication as LDAP
3. Input the required configurations, "UID Attribute:" and "Mail Attribute:"

Expected Results:
Quay config app will do validation based on users configurations, like UID and Mail

Actual Results:
Quay config app doesn't run the validations before saving the configurations.