dev.ost.com Fixes | users/airdrop/drop param requirements

[noslav]

the input params are not declared mandatory or optional

[noslav]

• error response msg to be corrected for errors.

{ "success": false, "err": { "code": "companyRestFulApi(s_am_s_3:HyEOVLDhz)", "msg": "Invalid airdropParams", "error_data": {} } }

• method to check for the BT balance of the client

• Check spelling in error messages
  { success: false, err: { code: 'companyRestFulApi(l_aa_sa_5:rJq6t8v2z)', msg: 'Invalid List type to airdrop users', error_data: [ [Object] ] } }

• list_type is mandatory but not mentioned in the documentation as such

[noslav]

Fixed by #45