SA1019: "io/ioutil" has been deprecated since Go 1.19: As of Go 1.16, the same functionality is now provided by package [io] or package [os], and those implementations should be preferred in new code. See the specific function documentation for details. (staticcheck)

S1012: should use time.Since instead of time.Now().Sub (staticcheck)

S1024: should use time.Until instead of t.Sub(time.Now()) (staticcheck)

QF1004: could use strings.ReplaceAll instead (staticcheck)

ineffectual assignment to err (ineffassign)

Error return value of `w.Write` is not checked (errcheck)

Error return value of `resp.Body.Close` is not checked (errcheck)

Error return value of `t.cache.Remove` is not checked (errcheck)

Error return value of `t.cache.Set` is not checked (errcheck)