post
https://kigo-core-server-stage.kigodigital.net/api/v1/accounts/log-in/email-and-password
Authenticates a user within a partner's account space using email and
password, scoped to the program identified by external_program_id, and
returns AccountSpaceApiSession access and refresh tokens. Requires a valid
partner session token. Lockout and validation behavior mirror the legacy
/accounts/log-in/email-and-password endpoint.