//
// Some OIDC implementations such as GitLab do not support
// claims as part of the normal oauth2 flow, instead rely
// on service providers making calls to IDP to fetch additional
// claims available from the UserInfo endpoint
func (p *providerCfg) UserInfo(ctx context.Context, accessToken string, transport http.RoundTripper) (map[string]interface{}, error) {

package provider

import (
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
	"net/url"
	"path"
	"strings"
	"sync"
)

// Token - parses the output from IDP id_token.
type Token struct {
	AccessToken string `json:"access_token"`
	Expiry      int    `json:"expires_in"`
}

// KeycloakProvider implements Provider interface for KeyCloak Identity Provider.

		Code:           "XMinioAdminConfigIDPCfgNameAlreadyExists",
		Description:    "An IDP configuration with the given name already exists",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrAdminConfigIDPCfgNameDoesNotExist: {
		Code:           "XMinioAdminConfigIDPCfgNameDoesNotExist",
		Description:    "No such IDP configuration exists",
		HTTPStatusCode: http.StatusBadRequest,
	},

  rotating credentials.

- Access to bucket(s) and object(s) are governed via IAM policies associated with the incoming
  login credentials.

- Allows authentication and access for all
  - Built-in IDP users and their respective service accounts
  - LDAP/AD users and their respective service accounts
  - OpenID/OIDC service accounts

- On versioned buckets, FTP/SFTP only operates on latest objects, if you need to retrieve

// ErrProviderConfigNotFound - represents a non-existing provider error.
var ErrProviderConfigNotFound = errors.New("provider configuration not found")

// GetConfigInfo - returns configuration and related info for the given IDP
// provider.
func (r *Config) GetConfigInfo(s config.Config, cfgName string) ([]madmin.IDPCfgInfo, error) {
	openIDConfigs, err := s.GetAvailableTargets(config.IdentityOpenIDSubSys)
	if err != nil {
		return nil, err

	err := s.client.MakeBucket(ctx, bucket, minio.MakeBucketOptions{})
	if err != nil {
		c.Fatalf("bucket create error: %v", err)
	}

	// Generate web identity STS token by interacting with OpenID IDP.
	token, err := MockOpenIDTestUserInteraction(ctx, testAppParams, "******@****.***", "dillon")
	if err != nil {
		c.Fatalf("mock user err: %v", err)
	}
	// fmt.Printf("TOKEN: %s\n", token)

```

> NOTE: You can configure the `scopes` parameter to restrict the OpenID scopes requested by minio to the IdP, for example, `"openid,policy_role_attribute"`, being `policy_role_attribute` a client_scope / client_mapper that maps a role attribute called policy to a `policy` claim returned by Keycloak

	// use that and validate the authentication request. If not, we assume this
	// is an STS request for a claim based IDP (if one is present) and set
	// roleArn = openid.DummyRoleARN.
	//
	// Currently, we do not support multiple claim based IDPs, as there is no
	// defined parameter to disambiguate the intended IDP in this STS request.
	roleArn := openid.DummyRoleARN
	roleArnStr := r.Form.Get(stsRoleArn)
	if roleArnStr != "" {

		requestorParentUser = cred.ParentUser
		requestorIsDerivedCredential = true
	}

	if globalIAMSys.GetUsersSysType() == MinIOUsersSysType && targetUser != cred.AccessKey {
		// For internal IDP, ensure that the targetUser's parent account exists.
		// It could be a regular user account or the root account.
		_, isRegularUser := globalIAMSys.GetUser(ctx, targetUser)

MINIO_IDENTITY_OPENID_CLIENT_SECRET*        (string)    secret for the unique public identifier for apps
MINIO_IDENTITY_OPENID_ROLE_POLICY           (string)    Set the IAM access policies applicable to this client application and IDP e.g. "app-bucket-write,app-bucket-list"
MINIO_IDENTITY_OPENID_CLAIM_NAME            (string)    JWT canned policy claim name (default: 'policy')