Create API for adding Transactions

[Vaibhav-22-dm]

Expected Behavior:

• API should be protected using custom authentication class.
• API should take _account_number, bankname, transactions(csv file) as input.
• Use appropriate parser class for extracting csv file from request.FILES and fetch account using the details provided.
• A utility function should be created that will take account and csv file as input and then convert the csv file to dataframe using pandas and add transactions one by one using a for loop.
• Entire function should be wrapped inside try-except block.