feat: Added Custom Auth

[kaanrkaan]

Description

Motivation: The current self-hosted version supports authentication through Google, GitHub, and local accounts. However, to provide a more flexible and comprehensive authentication solution, we propose integrating a Generic OAuth2. This integration enhances the versatility and scalability of the self-hosted version, making it more adaptable to diverse environments and user needs.

This pull request introduces support for a new custom OAuth flow, including backend and frontend changes. The most important changes include adding new API endpoints, updating the OAuth configuration, and modifying the frontend login page to support the custom OAuth provider.

Backend Changes:

• API Endpoints: Added new endpoints for starting and completing the custom OAuth flow in openapi.yaml and user.yaml. ([[1]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-97b387589242cdf48a7b66f4daa27066a206a9dcd8659d8587740c904aaa1ce7R43-R46), [[2]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-c9b0ba958712a3995a7c08989693bf7ddc047f2ada30416b359c158d444ad0f9R180-R209))
• OAuth Callback Handler: Implemented the handler for the custom OAuth callback, including user creation and token handling in custom_oauth_callback.go. ([api/v1/server/handlers/users/custom_oauth_callback.goR1-R171](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-efb7cb724507a0ef56ab3cc46321b34c90f4092cf4e0b7f7e27a6f4317915ed5R1-R171))
• OAuth Start Handler: Implemented the handler for initiating the custom OAuth flow in custom_oauth_start.go. ([api/v1/server/handlers/users/custom_oauth_start.goR1-R30](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-dd6f0cfcf68493068af113851e0eb93db747cc84ec34f24b0c926da594a1eac2R1-R30))
• OAuth Configuration: Added a new configuration structure and client creation function for the custom OAuth provider in configs.go. ([[1]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-0a89e2dc1668b45a0c13a724b8370395c6ba7858fc2e056b4dbe3c2294609922R14-R18), [[2]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-0a89e2dc1668b45a0c13a724b8370395c6ba7858fc2e056b4dbe3c2294609922R66-R78))

Frontend Changes:

• Login Page: Updated the login page to include the custom OAuth provider option in index.tsx. ([[1]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-58fcbd495ec97f2dcd23d93ae89964a861312c6ad7e57e77581aabb6ecbbd561R26-R33), [[2]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-58fcbd495ec97f2dcd23d93ae89964a861312c6ad7e57e77581aabb6ecbbd561R45), [[3]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-58fcbd495ec97f2dcd23d93ae89964a861312c6ad7e57e77581aabb6ecbbd561R161-R170))

Other Changes:

• Protobuf Updates: Updated protobuf files to a newer version. ([[1]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-5dae58817d67249465ccd577680efbe209af6efd05e69414732d6e1e5f273b34L4-R4), [[2]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-a7b46e898d2bf451ca3ddef8aec670eaf3819e194f660c19dac9da4f2548edc5L4-R4), [[3]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-4aad7ea9705bab7520e2aebcf18514f535b747ca161334b11d5a3c0f7e8fe46eL4-R4), [[4]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-6b1d5f75ca8e6540cb6248394678ed3e41631a394681e9b69bb14fd356a96b9cL4-R4), [[5]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-ee2f134689e37199fade5382ed922d587113363950401bf11f36a6b377644e65L4-R4), [[6]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-379298bd2027b3e847425ab728ebd7d083ea09afcae68991e1a4db672c075d07L4-R4))
• Client Interface: Added new methods to the client interface for the custom OAuth endpoints in gen.go. ([[1]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-984209ef99f3799ba42a3c327662ca8344b5a2e5cda37abc31040e0aff2c9a58R2129-R2134), [[2]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-984209ef99f3799ba42a3c327662ca8344b5a2e5cda37abc31040e0aff2c9a58R3277-R3300), [[3]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-984209ef99f3799ba42a3c327662ca8344b5a2e5cda37abc31040e0aff2c9a58R7531-R7584), [[4]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-984209ef99f3799ba42a3c327662ca8344b5a2e5cda37abc31040e0aff2c9a58R8751-R8756), [[5]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-984209ef99f3799ba42a3c327662ca8344b5a2e5cda37abc31040e0aff2c9a58R10533-R10574), [[6]](https://github.com/hatchet-dev/hatchet/pull/1139/files#diff-984209ef99f3799ba42a3c327662ca8344b5a2e5cda37abc31040e0aff2c9a58R11894-R11911))

Added following env values:

• SERVER_AUTH_CUSTOM_ENABLED
• SERVER_AUTH_CUSTOM_CLIENT_ID
• SERVER_AUTH_CUSTOM_CLIENT_SECRET
• SERVER_AUTH_CUSTOM_AUTHORIZATION_URL
• SERVER_AUTH_CUSTOM_ACCESS_TOKEN_URL
• SERVER_AUTH_CUSTOM_RESOURCE_URL
• SERVER_AUTH_CUSTOM_SCOPES

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

[vercel]

@kaanrkaan is attempting to deploy a commit to the Hatchet Team on Vercel.

A member of the Team first needs to authorize it.

[kaanrkaan]

@abelanger5, I would greatly appreciate any feedback or review you may have on this. Thank you!

[abelanger5]

Hey @kaanrkaan, thanks for the PR! I'll be taking a close look at this in the next couple of days and will keep you updated.