custom exp and nbf

claims.go

@@ -3,6 +3,7 @@
 package jwt
 
 // Claims is the claim type of the token
+// The Claims map is not goroutine safe
 type Claims map[string]interface{}
 
 // Get returns a value from the claims map
@@ -70,3 +71,8 @@ func (c Claims) Set(key string, v interface{}) {
 	}
 	c[key] = v
 }
+
+// Delete removes the key from the claims map
+func (c Claims) Delete(key string) {
+	delete(c, key)
+}