Refactor getUploads method and updated the test functions

[unniznd]

Updated getUploads Function:

• Modified getUploads to use token and lastKey parameters as per the updated API documentation.
• Changed getUploads from a static function to a class method to properly utilize the token.

Adjusted Test Cases for getUploads:

• Updated test cases to reflect the new parameters (token and lastKey) and class method structure.

Updated Deal Status Test Function:

• Modified the deal status test function to account for the API response field change from dealId to DealID.