<![CDATA[I'm seeing a "cannot deserialize value of type ‘java.util.uuid’ from string" error when posting to /api/login]]>I'm using a load testing tool and seeing the message "cannot deserialize value of type ‘java.util.uuid’ from string".

Here's what I'm sending to FusionAuth:

{
     "applicationId": 15e45e7d-3e34-43df-9366-91c66a8cc9ae,
     "loginId": "myuserid",
     "password": "mypassword"
}
]]>https://fusionauth.io/community/forum/topic/102/i-m-seeing-a-cannot-deserialize-value-of-type-java-util-uuid-from-string-error-when-posting-to-api-loginRSS for NodeThu, 08 Oct 2026 13:43:56 GMTThu, 21 May 2020 14:59:55 GMT60<![CDATA[Reply to I'm seeing a "cannot deserialize value of type ‘java.util.uuid’ from string" error when posting to /api/login on Thu, 21 May 2020 15:00:53 GMT]]>It looks like the uuid isn't being sent as a string. Per https://fusionauth.io/docs/v1/tech/reference/data-types#uuids it should be quoted.

So you want to send:

{
     "applicationId": "15e45e7d-3e34-43df-9366-91c66a8cc9ae",
     "loginId": "myuserid",
     "password": "mypassword"
}
]]>https://fusionauth.io/community/forum/post/226https://fusionauth.io/community/forum/post/226Thu, 21 May 2020 15:00:53 GMT