Authenticate user

curl --request POST \
  --url https://api.fluxend.app/users/login \
  --header 'Content-Type: application/json' \
  --data '{
  "email": "<string>",
  "password": "<string>"
}'

{
  "content": {
    "bio": "<string>",
    "createdAt": "<string>",
    "email": "<string>",
    "organizationUuid": "<string>",
    "roleId": 123,
    "status": "<string>",
    "updatedAt": "<string>",
    "username": "<string>",
    "uuid": "<string>"
  },
  "errors": [
    "<string>"
  ],
  "metadata": "<any>",
  "success": true
}