> ## Documentation Index > Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt > Use this file to discover all available pages before exploring further. # Add Username Password > Adds playfab username/password auth to an existing account created via an anonymous auth method, e.g. automatic device ID login. ## Error codes This operation may return the following PlayFab errors: | Error | Code | | --- | --- | | AccountAlreadyLinked | 1011 | | EmailAddressNotAvailable | 1006 | | InvalidEmailAddress | 1005 | | InvalidPassword | 1008 | | InvalidUsername | 1007 | | UsernameNotAvailable | 1009 | ## OpenAPI ````yaml post /Client/AddUsernamePassword openapi: 3.0.0 info: version: '260922' title: PlayFab Client API description: >- APIs which provide the full range of PlayFab features available to the client - authentication, account and data management, inventory, friends, matchmaking, reporting, and platform-specific functionality termsOfService: https://playfab.com/terms/ contact: url: https://community.playfab.com/index.html license: name: Apache 2.0 url: https://github.com/PlayFab/API_Specs/blob/master/LICENSE servers: - url: https://{titleId}.playfabapi.com description: PlayFab title endpoint variables: titleId: default: your_title_id description: Your PlayFab title ID (hex). security: [] tags: - name: Account Management description: Account Management APIs - name: Advertising description: Advertising APIs - name: Analytics description: Analytics APIs - name: Authentication description: Authentication APIs - name: Character Data description: Character Data APIs - name: Characters description: Characters APIs - name: Content description: Content Service APIs - name: Friend List Management description: Friend List Management APIs - name: Matchmaking description: Matchmaking APIs - name: Platform Specific Methods description: Platform Specific Methods APIs - name: Player Data Management description: Player Data Management APIs - name: Player Item Management description: Player Item Management APIs - name: PlayStream description: PlayStream Management APIs - name: Server-Side Cloud Script description: Server-Side Cloud Script APIs - name: Shared Group Data description: Shared Group Data APIs - name: Title-Wide Data Management description: Title-Wide Data Management APIs - name: Trading description: Trading Management APIs paths: /Client/AddUsernamePassword: post: tags: - Account Management summary: Add Username Password description: > Adds playfab username/password auth to an existing account created via an anonymous auth method, e.g. automatic device ID login. ## Error codes This operation may return the following PlayFab errors: | Error | Code | | --- | --- | | AccountAlreadyLinked | 1011 | | EmailAddressNotAvailable | 1006 | | InvalidEmailAddress | 1005 | | InvalidPassword | 1008 | | InvalidUsername | 1007 | | UsernameNotAvailable | 1009 | operationId: AddUsernamePassword requestBody: content: application/json: schema: $ref: '#/components/schemas/AddUsernamePasswordRequest' responses: '200': $ref: '#/components/responses/AddUsernamePasswordResult' '400': $ref: '#/components/responses/ApiErrorWrapper' security: - SessionTicket: [] components: schemas: AddUsernamePasswordRequest: type: object properties: CustomTags: description: >- The optional custom tags associated with the request (e.g. build number, external trace identifiers, etc.). type: object Email: description: User email address attached to their account type: string Password: description: Password for the PlayFab account (6-100 characters) type: string Username: description: PlayFab username for the account (3-20 characters) type: string required: - Username - Email - Password example: Username: theuser Email: me@here.com Password: ExampleSecret AddUsernamePasswordResult: description: >- Each account must have a unique username and email address in the PlayFab service. Once created, the account may be associated with additional accounts (Steam, Facebook, Game Center, etc.), allowing for added social network lists and achievements systems. This can also be used to provide a recovery method if the user loses their original means of access. type: object properties: Username: description: PlayFab unique user name. type: string example: Username: username ApiErrorWrapper: description: The basic wrapper around every failed API response type: object properties: code: description: Numerical HTTP code type: integer status: description: String HTTP code type: string error: description: Playfab error code type: string errorCode: description: Numerical PlayFab error code type: integer errorMessage: description: Description for the PlayFab errorCode type: string errorDetails: description: Detailed description of individual issues with the request object type: object required: - code - errorCode responses: AddUsernamePasswordResult: description: >- Each account must have a unique username and email address in the PlayFab service. Once created, the account may be associated with additional accounts (Steam, Facebook, Game Center, etc.), allowing for added social network lists and achievements systems. This can also be used to provide a recovery method if the user loses their original means of access. content: application/json: schema: type: object properties: code: type: integer description: >- The Http status code. If X-ReportErrorAsSuccess header is set to true, this will report the actual http error code. status: type: string description: The Http status code as a string. data: $ref: '#/components/schemas/AddUsernamePasswordResult' example: code: 200 status: OK data: Username: username ApiErrorWrapper: description: This is the outer wrapper for all responses with errors content: application/json: schema: $ref: '#/components/schemas/ApiErrorWrapper' securitySchemes: SessionTicket: type: apiKey in: header name: X-Authorization description: >- This API requires a client session ticket, available from any Client Login function. ```` ## Related topics - [Add Username Password](/api-reference/account-management/add-username-password.md) - [PFAccountManagementAddUsernamePasswordResult](/services/playfab/api-references/c/pfaccountmanagementtypes/structs/pfaccountmanagementaddusernamepasswordresult.md) - [PFAccountManagementAddUsernamePasswordRequest](/services/playfab/api-references/c/pfaccountmanagementtypes/structs/pfaccountmanagementaddusernamepasswordrequest.md) - [PFAccountManagementClientAddUsernamePasswordAsync](/services/playfab/api-references/c/pfaccountmanagement/functions/pfaccountmanagementclientaddusernamepasswordasync.md) - [PFAccountManagementClientAddUsernamePasswordGetResult](/services/playfab/api-references/c/pfaccountmanagement/functions/pfaccountmanagementclientaddusernamepasswordgetresult.md)