there is only one IDP and no password auth, because the upstream IDP login happens right away
there is only password auth, because the user is presented with a username/login form
We need to enhance the experience when there are multiple upstream IdPs, and/or a mix of upstream IdPs and local password authentication options.
### Tasks
- [x] #2065
- [ ] https://github.com/element-hq/matrix-authentication-service/issues/3244
- [ ] Users can discover which IdP they used from their username (?)
This issue was originally created by @pmaier1 at https://github.com/matrix-org/matrix-authentication-service/issues/1874.
Currently, the experience is good enough when:
We need to enhance the experience when there are multiple upstream IdPs, and/or a mix of upstream IdPs and local password authentication options.