Message user is like this

message User {
    int32 uid = 1;
    string username = 2;
    string password = 3;
}

looks like this:

type User struct {
    Uid                  int32    `protobuf:"varint,1,opt,name=uid,proto3" json:"uid,omitempty"`
    Username             string   `protobuf:"bytes,2,opt,name=username,proto3" json:"username,omitempty"`
    Password             string   `protobuf:"bytes,3,opt,name=password,proto3" json:"password,omitempty"`
    XXX_NoUnkeyedLiteral struct{} `json:"-"`
    XXX_unrecognized     []byte   `json:"-"`
    XXX_sizecache        int32    `json:"-"`
}

I directly use the above User to deposit MySQL will make an error, because XXX_NoUnkeyedLiteral these fields do not exist, there is a solution is that I manually change the generated code, ignore these fields , but I do not know how to do it?