fix(api): change field name to login

Author: ayn2op

api/login.go

@@ -15,12 +15,13 @@ type LoginResponse struct {
 	Token  string `json:"token"`
 }
 
-func (c *Client) Login(email, password string) (*LoginResponse, error) {
+// login is the user's email or E.164-formatted phone number
+func (c *Client) Login(login, password string) (*LoginResponse, error) {
 	var param struct {
-		Email    string `json:"email"`
+		Login    string `json:"login"`
 		Password string `json:"password"`
 	}
-	param.Email = email
+	param.Login = login
 	param.Password = password
 
 	var r *LoginResponse