[🚀 | Feature request]: Notify claimer when greeter changed their name

[AureliaDolo]

Context

The greeter can change the name of the claimer during the greeting process, but the claimer is not notified about it.

What you would like to accomplish

Notify the claimer that the name under which they registered was changed by the greeter.

How the feature should work

Either one should work

• repeat the name on the last modal
• have a popup next to the user name on first connection

Describe alternatives you have considered

No response

[AureliaDolo]

Other alternatives could be

• forbid the greeter to change the name (⚠ security impact to measure)
• add a warning "the admin will review and may change your username" on name selection
• generate an invite for a given mail and username