diesel = { version = "2.0.0", features = ["postgres", "uuid", "chrono", "r2d2"] }

warning: #[table_name] attribute form is deprecated
  = help: use `#[diesel(table_name = users)]` instead

error[E0308]: mismatched types
    --> src/user/service/list.rs:18:23
     |
18   |         .load::<User>(conn)?)
     |          ------------ ^^^^ types differ in mutability
     |          |
     |          arguments to this function are incorrect
     |
     = note: expected mutable reference `&mut _`
                        found reference `&diesel::r2d2::PooledConnection<diesel::r2d2::ConnectionManager<diesel::PgConnection>>`
note: associated function defined here
    --> /home//.cargo/registry/src/github.com-1ecc6299db9ec823/diesel-2.0.0/src/query_dsl/mod.rs:1497:8
     |
1497 |     fn load<'query, U>(self, conn: &mut Conn) -> QueryResult<Vec<U>>
     |        ^^^^

error[E0308]: mismatched types
    --> src/user/service/login.rs:18:24
     |
18   |         .first::<User>(conn)
     |          ------------- ^^^^ types differ in mutability
     |          |
     |          arguments to this function are incorrect
     |
     = note: expected mutable reference `&mut _`
                        found reference `&diesel::r2d2::PooledConnection<diesel::r2d2::ConnectionManager<diesel::PgConnection>>`
note: associated function defined here
    --> /home//.cargo/registry/src/github.com-1ecc6299db9ec823/diesel-2.0.0/src/query_dsl/mod.rs:1733:8
     |
1733 |     fn first<'query, U>(self, conn: &mut Conn) -> QueryResult<U>
     |        ^^^^^

error[E0308]: mismatched types
    --> src/user/service/register.rs:16:83
     |
16   |     let inserted_user: User = diesel::insert_into(users).values(&user).get_result(conn)?;
     |                                                                        ---------- ^^^^ types differ in mutability
     |                                                                        |
     |                                                                        arguments to this function are incorrect
     |
     = note: expected mutable reference `&mut _`
                        found reference `&diesel::PgConnection`
note: associated function defined here
    --> /home//.cargo/registry/src/github.com-1ecc6299db9ec823/diesel-2.0.0/src/query_dsl/mod.rs:1677:8
     |
1677 |     fn get_result<'query, U>(self, conn: &mut Conn) -> QueryResult<U>
     |        ^^^^^^^^^^

For more information about this error, try `rustc --explain E0308`.
error: could not compile `canduma` due to 3 previous errors