case conf.AccessKey == "" && conf.SecretKey != "" || conf.AccessKey != "" && conf.SecretKey == "":
		return nil, errors.New("both the access and secret keys are required")
	case conf.AWSRole && (conf.AWSRoleWebIdentityTokenFile != "" || conf.AWSRoleARN != "" || conf.AccessKey != "" || conf.SecretKey != ""):
		return nil, errors.New("AWS Role cannot be activated with static credentials or the web identity token file")
	case conf.Bucket == "":

	madmin.TierAzure
}

func (conf azureConf) Validate() error {
	switch {
	case conf.AccountName == "":
		return errors.New("the account name is required")
	case conf.AccountKey != "" && (conf.SPAuth.TenantID != "" || conf.SPAuth.ClientID != "" || conf.SPAuth.ClientSecret != ""):
		return errors.New("multiple authentication mechanisms are provided")

          sudo sysctl net.ipv6.conf.all.disable_ipv6=0
          sudo sysctl net.ipv6.conf.default.disable_ipv6=0
          make test-pbac

      - name: Test Config File
        run: |
          sudo sysctl net.ipv6.conf.all.disable_ipv6=0
          sudo sysctl net.ipv6.conf.default.disable_ipv6=0
          make test-configfile

      - name: Test Replication
        run: |
          sudo sysctl net.ipv6.conf.all.disable_ipv6=0

}

func newWarmBackendMinIO(conf madmin.TierMinIO, tier string) (*warmBackendMinIO, error) {
	// Validation of credentials
	if conf.AccessKey == "" || conf.SecretKey == "" {
		return nil, errors.New("both access and secret keys are required")
	}

	if conf.Bucket == "" {
		return nil, errors.New("no bucket name was provided")
	}

	u, err := url.Parse(conf.Endpoint)
	if err != nil {
		return nil, err

	}
	return false, nil
}

func newWarmBackendGCS(conf madmin.TierGCS, tier string) (*warmBackendGCS, error) {
	// Validation code
	if conf.Creds == "" {
		return nil, errors.New("empty credentials unsupported")
	}

	if conf.Bucket == "" {
		return nil, errors.New("no bucket name was provided")
	}

	credsJSON, err := conf.GetCredentialJSON()
	if err != nil {
		return nil, err
	}

  minio4:
    <<: *minio-common
    hostname: minio4
    volumes:
      - data4-1:/data1
      - data4-2:/data2

  nginx:
    image: nginx:1.19.2-alpine
    hostname: nginx
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf:ro
    ports:
      - "9000:9000"
      - "9001:9001"
    depends_on:
      - minio1
      - minio2
      - minio3
      - minio4

## By default this config uses default local driver,

    * When creating an explicit `JSONResponse` the `content` argument is now required.

### Docs

* 📝 Add external link to article: Seamless FastAPI Configuration with ConfZ. PR [#4414](https://github.com/tiangolo/fastapi/pull/4414) by [@silvanmelchior](https://github.com/silvanmelchior).