warning: taken reference of right operand
   --> src/key.rs:212:9
    |
212 |         String::new() + &self + rhs
    |         ^^^^^^^^^^^^^^^^-----
    |                         |
    |                         help: use the right value directly: `self`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
    = note: `#[warn(clippy::op_ref)]` on by default

warning: deref which would be done by auto-deref
   --> src/session.rs:818:55
    |
818 |                 let body = match serde_json::from_str(&*body)? {
    |                                                       ^^^^^^ help: try: `&body`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
    = note: `#[warn(clippy::explicit_auto_deref)]` on by default

warning: the borrowed expression implements the required traits
   --> src/session.rs:749:70
    |
749 |                       base64::engine::general_purpose::STANDARD.encode(&format!(
    |  ______________________________________________________________________^
750 | |                         "{}:{}",
751 | |                         url.username(),
752 | |                         url.password().unwrap_or("")
753 | |                     ))
    | |_____________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
    = note: `#[warn(clippy::needless_borrow)]` on by default
help: change this to
    |
749 ~                     base64::engine::general_purpose::STANDARD.encode(format!(
750 +                         "{}:{}",
751 +                         url.username(),
752 +                         url.password().unwrap_or("")
753 ~                     ))
    |