You have to pass one of "test_con","import_file" or "existing_file":
- "test_con" only validates if endpoint and token are correct. Doesn;t start import.
- "import_file" is used when uploding export.
- "existing_file" is used when file is already uploaded
This API call starts a new import process.
It is possible to start new process, if there are not any files left from previous import for the same ID.
Token should be passed in header OR as path parameter.