# Source: https://infisical.com/docs/api-reference/endpoints/groups/add-group-user.md

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

# Add Group User



## OpenAPI

````yaml POST /api/v1/groups/{id}/users/{username}
openapi: 3.0.3
info:
  title: Infisical API
  description: List of all available APIs that can be consumed
  version: 0.0.1
servers:
  - url: https://us.infisical.com
    description: Production server (US)
  - url: https://eu.infisical.com
    description: Production server (EU)
  - url: http://localhost:8080
    description: Local server
security: []
paths:
  /api/v1/groups/{id}/users/{username}:
    post:
      tags:
        - Groups
      operationId: addUserToGroup
      parameters:
        - schema:
            type: string
          in: path
          name: id
          required: true
          description: The ID of the group to add the user to.
        - schema:
            type: string
          in: path
          name: username
          required: true
          description: The username of the user to add to the group.
      responses:
        '200':
          description: Default Response
          content:
            application/json:
              schema:
                type: object
                properties:
                  email:
                    type: string
                    nullable: true
                  username:
                    type: string
                  firstName:
                    type: string
                    nullable: true
                  lastName:
                    type: string
                    nullable: true
                  id:
                    type: string
                    format: uuid
                required:
                  - username
                  - id
                additionalProperties: false
        '400':
          description: Default Response
          content:
            application/json:
              schema:
                type: object
                properties:
                  reqId:
                    type: string
                  statusCode:
                    type: number
                    enum:
                      - 400
                  message:
                    type: string
                  error:
                    type: string
                  details: {}
                required:
                  - reqId
                  - statusCode
                  - message
                  - error
                additionalProperties: false
        '401':
          description: Default Response
          content:
            application/json:
              schema:
                type: object
                properties:
                  reqId:
                    type: string
                  statusCode:
                    type: number
                    enum:
                      - 401
                  message:
                    type: string
                  error:
                    type: string
                required:
                  - reqId
                  - statusCode
                  - message
                  - error
                additionalProperties: false
        '403':
          description: Default Response
          content:
            application/json:
              schema:
                type: object
                properties:
                  reqId:
                    type: string
                  statusCode:
                    type: number
                    enum:
                      - 403
                  message:
                    type: string
                  details: {}
                  error:
                    type: string
                required:
                  - reqId
                  - statusCode
                  - message
                  - error
                additionalProperties: false
        '404':
          description: Default Response
          content:
            application/json:
              schema:
                type: object
                properties:
                  reqId:
                    type: string
                  statusCode:
                    type: number
                    enum:
                      - 404
                  message:
                    type: string
                  error:
                    type: string
                required:
                  - reqId
                  - statusCode
                  - message
                  - error
                additionalProperties: false
        '422':
          description: Default Response
          content:
            application/json:
              schema:
                type: object
                properties:
                  reqId:
                    type: string
                  statusCode:
                    type: number
                    enum:
                      - 422
                  message: {}
                  error:
                    type: string
                required:
                  - reqId
                  - statusCode
                  - error
                additionalProperties: false
        '500':
          description: Default Response
          content:
            application/json:
              schema:
                type: object
                properties:
                  reqId:
                    type: string
                  statusCode:
                    type: number
                    enum:
                      - 500
                  message:
                    type: string
                  error:
                    type: string
                required:
                  - reqId
                  - statusCode
                  - message
                  - error
                additionalProperties: false

````