App on ios crashes when the user tries to join the community.

[kingalg]

IOS - 2.1.2 (362)

App on iOS crashes when the user tries to join the community.

Steps to recreate:

• install version 362 on ios from TestFlight,
• try joining the community with your preferred method of joining
• try to register the username
  What happens: As soon as the user tries to register the username, the app crashes and turns off.

Important info:

• it doesn't happen when the user creates a new community and register a username,
• it's not consistent, sometimes it's possible to register a username while joining the community,
• it happens regardless of the source of the invite code - I tested mostly with the QR code and Lucas with the invite link past directly in the app, and we got similar results

[kingalg]

Duplicate with #2324.