user=> (def a {:a 1})
#'user/a
user=> (def b {:a 1})
#'user/b
user=> (= a b)

user=> (ref a)
#object[clojure.lang.Ref 0x7026b7ee {:status :ready, :val {:a 1}}]
user=> (ref b)
#object[clojure.lang.Ref 0x62a4417 {:status :ready, :val {:a 1}}]

Clojure’s = is true when called with two mutable Clojure objects, i.e. vars, refs, atoms, or agents, or with two "pending" Clojure objects, i.e. futures, promises, or delays, if:

Both arguments are the identical object, i.e. (identical? x y) is true.

user=> (def x {:foo 1, :bar -3})
#'user/x
user=> (def y {:foo 1, :bar -3})
#'user/y
;; Values are equal, but different objects were constructed
user=> (= x y)
true
user=> (identical? x y)
false

def __eq__(self, other):
    return self.login == other.login