> ## Documentation Index > Fetch the complete documentation index at: https://docs.flowpayroll.ai/llms.txt > Use this file to discover all available pages before exploring further. # Resend an invitation > Emails the invitation again with a fresh temporary password, so it is not a repeat of the same message: the previous temporary password stops working. 409 `already_signed_in` once they have signed in, because there is no invitation left to accept — they should use the password reset on the sign-in page instead. 409 `signs_in_through_identity_provider` when they sign in through your account's identity provider: they were never sent a password, and open Flow Payroll from the provider. 429 `invitation_sent_recently` if an invitation was sent to them in the last minute. ## OpenAPI ````yaml /api-reference/specs/administration.json post /users/{principalId}/resend-invitation openapi: 3.0.1 info: title: Administration API description: >- Manage your Flow Payroll account: the organisations it owns, the people who can sign in to it, the API tokens it holds, its brand, and a feed of recent administration activity. Every resource is scoped to the account your credentials belong to, so no request ever names a customer and the `X-Org-Id` header is not used. version: v1 servers: - url: https://api.sandbox.flowpayroll.ai/v1/administration security: - X-Auth-Token: [] tags: - name: Customer description: >- Your account: the customer every other resource on this API belongs to. Read it and rename it. - name: Organisations description: >- The organisations your account owns: list them with headcounts and your access to each, get one in full, and add one or several at a time. - name: Users description: >- The people who can sign in to your account: list, invite (one or many), resend invitations, and manage each person's direct grants and account-wide access. - name: API tokens description: >- The client credentials your integrations authenticate with: create (the secret is shown once), rename, rotate, revoke, and manage which organisations each token reaches. - name: Activity description: Recent administration actions in your account, newest first. paths: /users/{principalId}/resend-invitation: post: tags: - Users summary: Resend an invitation description: >- Emails the invitation again with a fresh temporary password, so it is not a repeat of the same message: the previous temporary password stops working. 409 `already_signed_in` once they have signed in, because there is no invitation left to accept — they should use the password reset on the sign-in page instead. 409 `signs_in_through_identity_provider` when they sign in through your account's identity provider: they were never sent a password, and open Flow Payroll from the provider. 429 `invitation_sent_recently` if an invitation was sent to them in the last minute. operationId: ResendUserInvitation parameters: - name: principalId in: path required: true schema: type: string responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/UserInvitationResentResponseResponseBody' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/ObjectResponseBody' '403': description: Forbidden content: application/json: schema: $ref: '#/components/schemas/ObjectResponseBody' '404': description: Not Found content: application/json: schema: $ref: '#/components/schemas/ObjectResponseBody' '409': description: Conflict content: application/json: schema: $ref: '#/components/schemas/ObjectResponseBody' '429': description: Too Many Requests content: application/json: schema: $ref: '#/components/schemas/ObjectResponseBody' components: schemas: UserInvitationResentResponseResponseBody: type: object properties: message: $ref: '#/components/schemas/MessageWithTokenResponse' content: $ref: '#/components/schemas/UserInvitationResentResponseContentResponse' validationIssues: type: array items: $ref: '#/components/schemas/ValidationIssue' nullable: true additionalProperties: false ObjectResponseBody: type: object properties: message: $ref: '#/components/schemas/MessageWithTokenResponse' content: $ref: '#/components/schemas/ObjectContentResponse' validationIssues: type: array items: $ref: '#/components/schemas/ValidationIssue' nullable: true additionalProperties: false MessageWithTokenResponse: type: object properties: text: type: string token: type: string tokenArguments: type: array items: $ref: '#/components/schemas/ValidationIssueArgument' nullable: true additionalProperties: false UserInvitationResentResponseContentResponse: type: object properties: data: $ref: '#/components/schemas/UserInvitationResentResponse' metadata: $ref: '#/components/schemas/ContentMetadataResponse' additionalProperties: false ValidationIssue: type: object properties: field: type: string reason: type: string reasonToken: type: string reasonTokenArguments: type: array items: $ref: '#/components/schemas/ValidationIssueArgument' nullable: true additionalProperties: false ObjectContentResponse: type: object properties: data: nullable: true metadata: $ref: '#/components/schemas/ContentMetadataResponse' additionalProperties: false ValidationIssueArgument: type: object properties: name: type: string value: nullable: true additionalProperties: false UserInvitationResentResponse: type: object properties: principalId: type: string description: The person the invitation went to. additionalProperties: false description: The person whose invitation was resent. ContentMetadataResponse: type: object properties: dateFormat: type: string dateTimeFormat: type: string paginationToken: type: string nullable: true additionalProperties: false securitySchemes: X-Auth-Token: type: apiKey description: FlowPayroll JWT (raw token, no Bearer prefix) name: X-Auth-Token in: header ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.