@type t() ::
  %ExBifrost.Model.GeminiGenerationRequestToolsInnerRetrievalExternalApiAuthConfig{
    apiKeyConfig:
      ExBifrost.Model.GeminiGenerationRequestToolsInnerRetrievalExternalApiAuthConfigApiKeyConfig.t()
      | nil,
    authType: String.t() | nil,
    googleServiceAccountConfig:
      ExBifrost.Model.GeminiGenerationRequestToolsInnerRetrievalExternalApiAuthConfigGoogleServiceAccountConfig.t()
      | nil,
    httpBasicAuthConfig:
      ExBifrost.Model.GeminiGenerationRequestToolsInnerRetrievalExternalApiAuthConfigHttpBasicAuthConfig.t()
      | nil,
    oauthConfig:
      ExBifrost.Model.GeminiGenerationRequestToolsInnerRetrievalExternalApiAuthConfigOauthConfig.t()
      | nil,
    oidcConfig:
      ExBifrost.Model.GeminiGenerationRequestToolsInnerRetrievalExternalApiAuthConfigOidcConfig.t()
      | nil
  }