added auth, examples for api reference

[Arppp]

This fixes

difference b/w mobile and billParamerers.value (Mobile Number)
Token API documentation in API Reference missing
Detailed information on request and response bodies
Length, data type (alpha numeric vs numeric etc)
Incorrect example value for mobile number field in recharge request response.
amount in paise or rupees - no clarity anywhere
Recharge status API needs paymentRefID, but where is this value coming from in recharge request response? I see transactionRefID and operatorRefID.
Transaction HIstory API:
What is the max limit the API supports? 100/200/500?
in response body amount in rs or paise?
Possible values for Enums wherever applicable like Status column.
Example for failure txns in history API
Some APIs don't have negative response example bodies.

[github-actions]

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