DescribeUserGroups (smaws-clients.Smaws_Client_ElastiCache.DescribeUserGroups)

val error_to_string : 
  [ Smaws_Lib.Protocols.AwsQuery.error
  | `InvalidParameterCombinationException of
    Types.invalid_parameter_combination_exception
  | `ServiceLinkedRoleNotFoundFault of
    Types.service_linked_role_not_found_fault
  | `UserGroupNotFoundFault of Types.user_group_not_found_fault ] ->
  string

val request : 
  'http_type Smaws_Lib.Context.t ->
  Types.describe_user_groups_message ->
  (Types.describe_user_groups_result,
    [> Smaws_Lib.Protocols.AwsQuery.error
    | `InvalidParameterCombinationException of
      Types.invalid_parameter_combination_exception
    | `ServiceLinkedRoleNotFoundFault of
      Types.service_linked_role_not_found_fault
    | `UserGroupNotFoundFault of Types.user_group_not_found_fault ])
    Stdlib.result

val request_with_metadata : 
  'http_type Smaws_Lib.Context.t ->
  Types.describe_user_groups_message ->
  (Types.describe_user_groups_result Smaws_Lib.Response.t,
    [> Smaws_Lib.Protocols.AwsQuery.error
    | `InvalidParameterCombinationException of
      Types.invalid_parameter_combination_exception
    | `ServiceLinkedRoleNotFoundFault of
      Types.service_linked_role_not_found_fault
    | `UserGroupNotFoundFault of Types.user_group_not_found_fault ]
    * Smaws_Lib.Response.metadata)
    Stdlib.result