Name validation

[ank1traj]

Able to add a number as a name.

[Rushikesh-purohit-0503]

I suggest to use Joi validation in this for every API's for this kind of bugs and sanitization of the given payload.
using that you can reduce the risk of the noSQL injections attack as well as provide valid payload for API's

also easy approach is just change the default type of the field with required type in database schema directly.