Changes to Retrieve wallet balance

the query request parameter currency became required

removed the enum value GHS from the query request parameter currency

removed the enum value KES from the query request parameter currency

removed the enum value NGN from the query request parameter currency

removed the enum value USD from the query request parameter currency

removed the enum value XOF from the query request parameter currency

removed the enum value ZAR from the query request parameter currency

the response's body type changed from object to no type for status 200

removed the optional property code from the response with the 200 status

removed the optional property data from the response with the 200 status

removed the optional property message from the response with the 200 status

removed the optional property status from the response with the 200 status

the endpoint scheme security ApiKeyAuth was added to the API

added SuccessResponseDto subschema #2 to the response body allOf list for the response status 200

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 404

added the non-success response with the status 422

added the non-success response with the status 500