User Story: if delete profile can/can't reuse the username

[RachWalm]

Story

As a user , I can ensure that profiles don't get mixed up so that I can have my data secure.

Acceptance Criteria

• The delete needs to delete all of the data
• Consider if more tickets need raising with extra functionality /error messages for this
• if another ticket needs raising raise it.

Tasks

• [x] Look into if a username can be reused after it has been deleted from the system
• [x] put appropriate functionality and error messages in place to organise this.

[RachWalm]

It was decided that although originally the functionality was pointing to 'User' therefore the allauth model when doing the delete that it would be better to just allow users to delete their profile if they wished and then they could rejoin the site using their original username. Also it avoids risk from legacy data later on. Therefore the delete functions now don't point to the user then point to their personal data in the profile models so you are just deleting their data so complies with GDPR, but the access is still available to start again.