Refactor Registration Flow to Remove Consent Screen and Anonymous Login and move Invitation Code screen

[Basler182]

Use Case

The registration process should be streamlined by removing the consent screen and anonymous user login, allowing users to register fully without needing an invitation code. However, the invitation code will be required upon login.

Problem

Solution

• Remove the consent screen and anonymous login from the registration process.
• Allow users to fully register without an invitation code.
• After login, prompt users to enter an invitation code if not already provided.
• Introduce two post-login states:
  • Logged in without invitation code: User sees only the invitation code screen.
  • Logged in with invitation code: User proceeds as usual.
• The user's Firestore account object will be checked for an existing invitation code to determine the user state

Alternatives considered

Additional context

No response

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