# Which Problems Are Solved
Zitadel never stored or returned the requested `response_mode` in oidc
Auth Requests. This caused the oidc library to fallback to the default
based on the response_type.
# How the Problems Are Solved
- Store the `response_mode` in the Auth request repo
- Store the `response_mode` in the Auth request v2 events
- Return the `resonse_mode` from the Auth Request v1 and v2
`ResponseMode()` methods. (Was hard-coded to an empty string)
# Additional Changes
- Populate the `response_modes_supported` to the oidc Discovery
Configuration. When it was empty, the standard specifies the default of
`query` and `fragment`. However, our oidc library also supports
`form_post` and by this fix, zitadel now also supports this.
# Additional Context
- Closes#6586
- Reported
https://discord.com/channels/927474939156643850/1151508313717084220
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Co-authored-by: Livio Spring <livio.a@gmail.com>
