[accountkey] add descriptive message at creation

add a descriptive message of what happens at key creation time

Author: pavanka

configure_cmd_test.go

@@ -26,7 +26,7 @@ func TestConfigureAccountKey(t *testing.T) {
 		t,
 		h.Out.String(),
 		`
-Input your account key or press enter to generate a new one.
+Input your account key or press ENTER to generate a new one.
 `)
 
 	h.env.In = ioutil.NopCloser(strings.NewReader("invalid\n"))

login.go

@@ -298,7 +298,14 @@ Please login to Parse using your email and password.`,
 
 func (l *login) helpCreateToken(e *env) (string, error) {
 	for i := 0; i < 4; i++ {
-		fmt.Fprintln(e.Out, "\nInput your account key or press enter to generate a new one.")
+		fmt.Fprintf(e.Out, `
+Input your account key or press ENTER to generate a new one.
+NOTE: on pressing ENTER we'll try to open the url:
+	%q
+in default browser.
+`,
+			keysURL,
+		)
 		fmt.Fprintf(e.Out, `Account Key: `)
 
 		var token string