Adding formData to HTTP Request

[AndyH_JSY]

Hello!

I am trying to authenticate with an API. On Swagger it shows I need to use formData fields.

I can authenticate fine from Swagger, but I am unable to replicate this in my Flow.

Queries do not work and I cannot put the JSON in the body, it will return URL not found, and I believe this is because I don't have the username and password fields as formData in the URL. 

Is anyone able to assist with how I will get my formData fields formatted in the request body please?

Thanks in advance!

[AndyH_JSY]

to add to this, I get 404 error when trying the below JSON body, but I do get some headers returned: 

{
  "$content-type": "multipart/form-data",
  "$multipart": [
    {
      "headers": {
        "Content-Disposition": "form-data; name=\"username\""
      },
      "body": "*****"
    },
    {
      "headers": {
        "Content-Disposition": "form-data; name=\"password\""
      },
      "body": "*****"
    }
  ]
}

Thanks!

[WillPage]