Error in using Map scheme type in mongoose

Question

I had defined my mongoose schema like this

export const DIDSchema: mongoose.Schema = new Schema({
    socialMediaHandles: {
        type: Map,
        of: String
      }
});

but when I try to compile the code, I am getting error like TypeError: Undefined type Map at socialMediaHandles Did you try nesting Schemas? You can only nest using refs or arrays.