> ## 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. # Link Game Center Account > Links the Game Center account associated with the provided Game Center ID to the user's PlayFab account. Logging in with a Game Center ID is insecure if you do not include the optional PublicKeyUrl, Salt, Signature, and Timestamp parameters in this request. It is recommended you require these parameters on all Game Center calls by going to the Apple Add-ons page in the PlayFab Game Manager and enabling the 'Require secure authentication only for this app' option. ## Error codes This operation may return the following PlayFab errors: | Error | Code | | --- | --- | | AccountAlreadyLinked | 1011 | | AccountLinkedToABannedPlayer | 1613 | | GameCenterAuthenticationFailed | 1429 | | InvalidGameCenterAuthRequest | 1428 | | LinkedAccountAlreadyClaimed | 1012 | ## OpenAPI ````yaml post /Client/LinkGameCenterAccount 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/LinkGameCenterAccount: post: tags: - Account Management summary: Link Game Center Account description: > Links the Game Center account associated with the provided Game Center ID to the user's PlayFab account. Logging in with a Game Center ID is insecure if you do not include the optional PublicKeyUrl, Salt, Signature, and Timestamp parameters in this request. It is recommended you require these parameters on all Game Center calls by going to the Apple Add-ons page in the PlayFab Game Manager and enabling the 'Require secure authentication only for this app' option. ## Error codes This operation may return the following PlayFab errors: | Error | Code | | --- | --- | | AccountAlreadyLinked | 1011 | | AccountLinkedToABannedPlayer | 1613 | | GameCenterAuthenticationFailed | 1429 | | InvalidGameCenterAuthRequest | 1428 | | LinkedAccountAlreadyClaimed | 1012 | operationId: LinkGameCenterAccount requestBody: content: application/json: schema: $ref: '#/components/schemas/LinkGameCenterAccountRequest' responses: '200': $ref: '#/components/responses/LinkGameCenterAccountResult' '400': $ref: '#/components/responses/ApiErrorWrapper' security: - SessionTicket: [] components: schemas: LinkGameCenterAccountRequest: type: object properties: CustomTags: description: >- The optional custom tags associated with the request (e.g. build number, external trace identifiers, etc.). type: object ForceLink: description: >- If another user is already linked to the account, unlink the other user and re-link. If the current user is already linked, link both accounts type: boolean GameCenterId: description: Game Center identifier for the player account to be linked. type: string PublicKeyUrl: description: >- The URL for the public encryption key that will be used to verify the signature. type: string Salt: description: A random value used to compute the hash and keep it randomized. type: string Signature: description: The verification signature of the authentication payload. type: string Timestamp: description: >- The integer representation of date and time that the signature was created on. PlayFab will reject authentication signatures not within 10 minutes of the server's current time. type: string required: - GameCenterId example: GameCenterId: 2998h2998f0b000d0993 LinkGameCenterAccountResult: type: object properties: {} 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: LinkGameCenterAccountResult: description: '' 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/LinkGameCenterAccountResult' 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 - [Link Game Center Account](/api-reference/account-management/link-game-center-account.md) - [PFAccountManagementLinkGameCenterAccountRequest](/services/playfab/api-references/c/pfaccountmanagementtypes/structs/pfaccountmanagementlinkgamecenteraccountrequest.md) - [PFAccountManagementClientLinkGameCenterAccountAsync](/services/playfab/api-references/c/pfaccountmanagement/functions/pfaccountmanagementclientlinkgamecenteraccountasync.md) - [PFAccountManagementClientUnlinkGameCenterAccountAsync](/services/playfab/api-references/c/pfaccountmanagement/functions/pfaccountmanagementclientunlinkgamecenteraccountasync.md) - [Account linking quickstart](/services/playfab/identity/player-identity/login/quickstart.md)