Fixed User data. Use MutableList instead of List

UserData.kt

@Entity(tableName = UserDao.TABLE_NAME)
data class User @JvmOverloads constructor(
        @PrimaryKey @ColumnInfo(name = COLUMN_ID) var id: Long? = null,
        @ColumnInfo(name = COLUMN_NAME) var name: String? = null,
        @ColumnInfo(name = COLUMN_EMAIL) var email: String? = null,
        @ColumnInfo(name = COLUMN_TYPES) var types: MutableList<UserType?>? = null
)

enum class UserType { GROWER, LAB, DISPENSARY, PATIENT, DOCTOR, SUPPLIER, TRANSPORTATION, GOVERNMENT }

object UserColumns {
    const val COLUMN_ID = "id"
    const val COLUMN_NAME = "name"
    const val COLUMN_EMAIL = "email"
    const val COLUMN_TYPES = "types"
}