Make sure we always load our default config values

config/bridge.go

@@ -1,6 +1,8 @@
 package config
 
 import (
+	"fmt"
+
 	"bytes"
 	"text/template"
 )
@@ -11,6 +13,21 @@ type bridge struct {
 	usernameTemplate *template.Template `yaml:"-"`
 }
 
+func (b *bridge) setDefaults() error {
+	var err error
+
+	if b.UsernameTemplate == "" {
+		b.UsernameTemplate = "Discord_{{.}}"
+	}
+
+	b.usernameTemplate, err = template.New("username").Parse(b.UsernameTemplate)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func (b *bridge) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	type rawBridge bridge
 
@@ -21,19 +38,16 @@ func (b *bridge) UnmarshalYAML(unmarshal func(interface{}) error) error {
 		return err
 	}
 
-	raw.usernameTemplate, err = template.New("username").Parse(raw.UsernameTemplate)
-	if err != nil {
-		return err
-	}
-
 	*b = bridge(raw)
 
-	return nil
+	return b.setDefaults()
 }
 
 func (b bridge) FormatUsername(userid string) string {
 	var buffer bytes.Buffer
 
+	fmt.Printf("bridge: %#v\n", b)
+
 	b.usernameTemplate.Execute(&buffer, userid)
 
 	return buffer.String()