# Postman - Create Users: "Connection must be enabled for this client to perform single user creation and signup operations"

**URL:** <https://community.auth0.com/t/postman-create-users-connection-must-be-enabled-for-this-client-to-perform-single-user-creation-and-signup-operations/148357>\
**Category:** Get Help\
**Tags:** users, management-api\
**Created:** [October 1, 2024, 9:40pm UTC](https://community.auth0.com/t/postman-create-users-connection-must-be-enabled-for-this-client-to-perform-single-user-creation-and-signup-operations/148357 "2024-10-01T21:40:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![luis.gamez](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/luis.gamez/32/33884_2.png) [@luis.gamez](https://community.auth0.com/u/luis.gamez)\
**Post date:** [October 1, 2024, 9:40pm UTC](https://community.auth0.com/t/postman-create-users-connection-must-be-enabled-for-this-client-to-perform-single-user-creation-and-signup-operations/148357/1 "2024-10-01T21:40:30Z")

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Ready to post? 🔍 First, try searching for your answer.  
Hi there!

I’m trying to automate the creation of more than one User using Postman Runs.

I start by sending a `POST` request as `client_credentials` hitting a M2M application with the `Auth0 Management API` enabled. I receive the token to perform operations.

I’m able to perform `GET` requests, so the token is valid and I have validated it in [jwt.io](http://jwt.io). Permissions are there to create users too.

When I try to create users to upload them to our `Username-Password- Authentication` database using the provided token, I get this error:

`{"statusCode":400,"error":"Bad Request","message":"Connection must be enabled for this client to perform single user creation and signup operations (client_id: xxxx - connection: Username-Password-Authentication)","errorCode":"auth0_idp_error"}`

[This solution](https://community.auth0.com/t/connection-must-be-enabled-for-this-client-to-perform-single-user-creation-and-signup-operations-error/123533) doesn’t help me as the application’s ID (client\_id: xxxx) is a M2M application where the `Auth0 Management API` is enabled and there are no `Connections`.

Also, checked [this post](https://community.auth0.com/t/machine-to-machine-connection-must-be-enabled-for-this-client-to-perform-single-user-creation-and-signup-operations/147878), but not sure how it can help me.

The M2M Application in question (`client_id: xxxx`) is authorized in `Applications` → `APIs` → `Auth0 Management API` → `Machine To Machine Applications` tab.

And the `Auth0 Management API` is authorized in the M2M Application (`client_id: xxxx`) - `Applications` → `Applications` → The M2M App in question → `APIs`

Any help, greatly appreciated!

@rueben.tiow you seem to know a bit about this topic! 😃

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**Author:** ![rueben.tiow](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/rueben.tiow/32/11646_2.png) [@rueben.tiow](https://community.auth0.com/u/rueben.tiow)\
**Post date:** [October 2, 2024, 7:44pm UTC](https://community.auth0.com/t/postman-create-users-connection-must-be-enabled-for-this-client-to-perform-single-user-creation-and-signup-operations/148357/3 "2024-10-02T19:44:42Z")

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Hi @luis.gamez,

To enable the connection for your M2M application, I recommend going to your [Dashboard → Authentication → Database → Username-Password- Authentication](https://manage.auth0.com/#/connections/database) → Applications tab and selecting your M2M application from there.

Let me know if you have any follow-up questions!

Cheers,  
Rueben

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<div class="post-metadata">

**Author:** ![luis.gamez](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/luis.gamez/32/33884_2.png) [@luis.gamez](https://community.auth0.com/u/luis.gamez)\
**Post date:** [October 2, 2024, 9:24pm UTC](https://community.auth0.com/t/postman-create-users-connection-must-be-enabled-for-this-client-to-perform-single-user-creation-and-signup-operations/148357/4 "2024-10-02T21:24:04Z")

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Thanks, @rueben.tiow

Totally missed that!

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<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/auth0/original/3X/b/5/b560f266932fcce5d57f09a6595bd50518cae3f3.jpeg) [@system](https://community.auth0.com/u/system)\
**Post date:** [October 16, 2024, 9:24pm UTC](https://community.auth0.com/t/postman-create-users-connection-must-be-enabled-for-this-client-to-perform-single-user-creation-and-signup-operations/148357/5 "2024-10-16T21:24:56Z")

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