Possible null reference argument for parameter 'user' in 'string AuthService.Create(User user)'.

Non-nullable property 'Currency' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'Name' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'Code' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Null should not be used for value type parameter 'amount' of type 'decimal'. Use a non-null value, or convert the parameter to a nullable type. (https://xunit.net/xunit.analyzers/rules/xUnit1012)

Possible null reference argument for parameter 'user' in 'string AuthService.Create(User user)'.

Non-nullable property 'Currency' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'Name' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'Code' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.