> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dados.rio/llms.txt
> Use this file to discover all available pages before exploring further.

# Remove member from group

> Remove a user from a group, revoking their access to group-based permissions.

**Authorization**: Users can remove members from groups they have permission to manage.
Permissions are checked via Cerbos policies.

**Member Identification**: Users are identified by their CPF (Brazilian tax ID).

**Impact**: Removing a user from a group will revoke all roles and permissions
they inherited through that group membership.

**Use Cases**:
- Remove users who no longer need access
- Administrative user management
- Security incidents requiring immediate access revocation
- Team restructuring

**Cache Invalidation**: User role caches are automatically invalidated to ensure
immediate effect of permission changes.



## OpenAPI

````yaml https://raw.githubusercontent.com/prefeitura-rio/heimdall/main/docs/api/openapi.json delete /api/v1/groups/{group_name}/members/{subject}
openapi: 3.1.0
info:
  title: Heimdall Admin Service
  description: >-
    # Heimdall Admin Service API


    A comprehensive admin service for user and group management with
    authorization powered by Cerbos.


    ## Features


    - **User Management**: Automatic user creation from JWT tokens with
    role-based access control

    - **Group Management**: Create, manage, and assign users to groups with
    hierarchical permissions

    - **Role Management**: Define and assign roles to users and groups

    - **Mapping Management**: Configure API endpoint to action mappings for
    authorization

    - **Action Management**: Define available actions for fine-grained
    permission control

    - **Cerbos Integration**: Policy-based authorization with external Cerbos
    service

    - **Audit Logging**: Comprehensive audit trail for all administrative
    operations

    - **Redis Caching**: High-performance caching for frequently accessed data
  version: 1.0.0
servers:
  - url: https://services.pref.rio/heimdall-admin
    description: Production server
  - url: https://services.staging.app.dados.rio/heimdall-admin
    description: Staging server
security: []
tags:
  - name: health
    description: Service health and readiness checks
  - name: users
    description: >-
      User management operations. Users are automatically created from JWT
      tokens.
  - name: groups
    description: >-
      Group management operations. Groups organize users and can have roles
      assigned.
  - name: memberships
    description: Group membership management. Assign and remove users from groups.
  - name: roles
    description: >-
      Role management operations. Roles define permissions that can be assigned
      to users or groups.
  - name: actions
    description: >-
      Action management operations. Actions define the granular permissions
      available in the system.
  - name: mappings
    description: >-
      API endpoint to action mapping configuration. Maps HTTP endpoints to
      authorization actions.
paths:
  /api/v1/groups/{group_name}/members/{subject}:
    delete:
      tags:
        - memberships
      summary: Remove member from group
      description: >-
        Remove a user from a group, revoking their access to group-based
        permissions.


        **Authorization**: Users can remove members from groups they have
        permission to manage.

        Permissions are checked via Cerbos policies.


        **Member Identification**: Users are identified by their CPF (Brazilian
        tax ID).


        **Impact**: Removing a user from a group will revoke all roles and
        permissions

        they inherited through that group membership.


        **Use Cases**:

        - Remove users who no longer need access

        - Administrative user management

        - Security incidents requiring immediate access revocation

        - Team restructuring


        **Cache Invalidation**: User role caches are automatically invalidated
        to ensure

        immediate effect of permission changes.
      operationId: >-
        remove_member_from_group_api_v1_groups__group_name__members__subject__delete
      parameters:
        - name: group_name
          in: path
          required: true
          schema:
            type: string
            title: Group Name
        - name: subject
          in: path
          required: true
          schema:
            type: string
            title: Subject
      responses:
        '204':
          description: Member removed from group successfully
        '400':
          description: Bad request - User not a member of the group
          content:
            application/json:
              example:
                detail: User is not a member of this group
        '401':
          description: Unauthorized - Invalid or missing JWT token
          content:
            application/json:
              example:
                detail: Could not validate credentials
        '403':
          description: >-
            Forbidden - Insufficient permissions to remove members from this
            group
          content:
            application/json:
              example:
                detail: >-
                  Permission denied to remove member from group
                  'engineering_team:backend'
        '404':
          description: Group or user not found
          content:
            application/json:
              example:
                detail: Group 'unknown-group' not found
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
        '500':
          description: Internal server error
          content:
            application/json:
              example:
                detail: 'Failed to remove member: Database connection error'
      security:
        - HTTPBearer: []
components:
  schemas:
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError
  securitySchemes:
    HTTPBearer:
      type: http
      scheme: bearer

````