Change resend to using smtp

Signed-off-by: Asai Neko <sugar@sne.moe>

service/auth/magic.go

@@ -6,8 +6,6 @@ import (
 	"nixcn-cms/pkgs/email"
 	"nixcn-cms/pkgs/turnstile"
 
-	log "github.com/sirupsen/logrus"
-
 	"github.com/gin-gonic/gin"
 	"github.com/spf13/viper"
 )
@@ -59,13 +57,12 @@ func Magic(c *gin.Context) {
 		return
 	} else {
 		// Send email using resend
-		resend, err := email.NewResendClient()
+		emailClient, err := email.NewSMTPClient()
 		if err != nil {
-			log.Error(err)
 			c.JSON(500, gin.H{"status": "invalid email config"})
 			return
 		}
-		resend.Send(
+		emailClient.Send(
 			req.Email,
 			"NixCN CMS Email Verify",
 			"<p>Click the link below to verify your email. This link will expire in 10 minutes.</p><a href="+url.String()+">"+url.String()+"</a>",