gssapi input credential type

fields:
  - id: host
    type: string
    label: Kafka Host
    help_text: Address of Kafka Host
  - id: port
    type: string
    label: Kafka Port
    help_text: Kafka Port
  - id: topic
    type: string
    label: Kafka Topic
    help_text: Kafka Topic
  - id: group_id
    type: string
    label: Group ID
    help_text: Kafka Group ID
  - id: offset
    type: string
    label: Offset to read
    choices:
      - latest
      - earliest
    default: latest
    help_text: Offset to read message from
  - id: sasl_mechanism
    type: string
    label: SASL Mechanism
    hidden: true
    default: GSSAPI
    help_text: SASL Mechanism
  - id: security_protocol
    type: string
    label: Security Protocol
    hidden: true
    default: SASL_PLAINTEXT
    help_text: Security Protocol
  - id: keytab
    type: string
    label: Kerberos Keytab
    format: binary_base64
    secret: true
    help_text: Kerberos Keytab file
    multiline: true
  - id: kerberos_config
    type: string
    label: Kerberos Config
    help_text: Kerberos Config file
    multiline: true
  - id: sasl_kerberos_service_name
    type: string
    label: Kerberos Service Name
    help_text: Kerberos Service Name
  - id: sasl_kerberos_domain_name
    type: string
    label: Kerberos Domain Name
    help_text: Kerberos Realm
required:
  - host
  - port
  - topic
  - group_id
  - sasl_kerberos_service_name
  - sasl_kerberos_domain_name
  - keytab
  - kerberos_config