Login returns 400 Bad Request

After logging into my React app, my alert says Logged In however I see that I am getting a 400 Bad Request error from Cognito Identity. I have pasted my request as a curl command.
I am having a difficult time trying to find out how to resolve it.

curl 'https://cognito-identity.us-west-2.amazonaws.com/' -H 'authority: cognito-identity.us-west-2.amazonaws.com' -H 'x-amz-content-sha256: c7786c3a445c86b2554a110091048a5797fc01ac133022a439c16067a7472ef6' -H 'sec-fetch-dest: empty' -H 'x-amz-target: AWSCognitoIdentityService.GetId' -H 'x-amz-user-agent: aws-amplify/2.3.0 js aws-amplify/2.3.0 js callback' -H 'user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36' -H 'content-type: application/x-amz-json-1.1' -H 'accept: */*' -H 'origin: http://localhost:8080' -H 'sec-fetch-site: cross-site' -H 'sec-fetch-mode: cors' -H 'referer: http://localhost:8080/login' -H 'accept-language: en-US,en;q=0.9' --data-binary '{"IdentityPoolId":"us-west-2:<id>","Logins":{"cognito-idp.us-west-2.amazonaws.com/us-east-2_QQn3eyWad":"<is this the signature?>"}}' --compressed

when I take the cURL command and paste it into Postman I receive this error:

    "Output": {
        "__type": "com.amazon.coral.service#UnknownOperationException",
        "message": null
    "Version": "1.0"

But this is rather vague

Does your continue to stay logged in after you refresh the page?

I was able to get it to work again. My request was bad.

I accidentally created my federated identities in a different region than my user pool.
I went back and re-did it so it is now a proper request to the proper services.

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