Issue Summary

An Enterprise can have a workspace setting where only users on a specific domain are allowed to be added to workspaces. However this setting is case sensitive and if a user attempts to add a user with the allowed domain but a different case, they will not be able to be added.

Steps to Reproduce

1. Go to the Workspace and Board Permissions tab in the Enterprise Admin Dashboard
2. Update the Workspace Membership Restriction to only allow a domain.
   1. For example `UsersInBuckets.com`
3. Try to add a user with the same domain but different case to an Enterprise workspace.
   1. For example the domain `usersinbuckets.com`

Expected Results

The user should successfully be added to the Enterprise Workspace.

Actual Results

The user is not added to the workspace and the following error is thrown:

'Member must be on an allowed domain' 

Workaround

The Enterprise Admin can change the domain in the Enterprise Settings to match the case spellings that their users have.