Added a command to change a user's password

lib/cli/cli.go

@@ -0,0 +1,35 @@
+package lib
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// prompt user for input
+func GetUserInput(consoleMsg string, confirm bool) (string, error) {
+	reader := bufio.NewReader(os.Stdin)
+	fmt.Print(fmt.Sprintf("%s: ", consoleMsg))
+	input, err := reader.ReadString('\n')
+
+	if err != nil {
+		return "", err
+	}
+
+	if confirm {
+		fmt.Print("Confirm: ")
+		confirm_input, confirm_err := reader.ReadString('\n')
+
+		if confirm_err != nil {
+			return "", confirm_err
+		}
+
+		if input != confirm_input {
+			return "", errors.New("The passwords provided do not match!")
+		}
+	}
+
+	return strings.TrimSpace(input), nil
+}