Issue:
refactor: use single purpose token and auth for accept invite

- use single purpose JWT auth and single purpose token for accept invite
- remove user without merchant JWT auth and user auth token

Resolution:
<think>
PR Context:
- Title: refactor(user): use single purpose token and auth to accept invite
- Merged: 2024-05-02T09:49:50Z
- Files changed: 5 files
- Commits: 1 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [ ] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
- Use single purpose JWT auth and single purpose token for accept invite
- Remove user without merchant JWT auth and user auth token

### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application co
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** refactor(user): use single purpose token and auth to accept invite (#4498)
Files to modify:


**crates/router/src/core/user_role.rs**
  Modify existing code

**crates/router/src/routes/user_role.rs**
  Modify existing code

**crates/router/src/services/authentication.rs**
  Remove:
    - function: pub::new_token
    - function: private::authenticate_and_fetch
    - struct: pub::UserWithoutMerchantFromToken
    - struct: pub::UserAuthToken
    - struct: pub::UserWithoutMerchantJWTAuth
    - impl: impl UserAuthToken
    - impl: impl AuthenticateAndFetch<UserWithoutMerchantFromToken, A> for UserWithoutMerchantJWTAuth

**crates/router/src/services/authentication/blacklist.rs**
  Remove:
    - function: private::check_in_blacklist
    - impl: impl BlackList for UserAuthToken

**crates/router/src/types/domain/user.rs**
  Modify existing code