fix lint

sshpiperd/challenger/pam/pam_challenger.go

@@ -3,9 +3,9 @@
 package pam
 
 import (
+	"errors"
 	"fmt"
 	"os"
-    "errors"
 
 	"golang.org/x/crypto/ssh"
 

sshpiperd/upstream/database/model.go

@@ -22,14 +22,14 @@ type keydata struct {
 
 type privateKey struct {
 	Key   keydata
-	KeyId int
+	KeyID int
 
 	UpstreamID int
 }
 
 type hostKey struct {
 	Key   keydata
-	KeyId int
+	KeyID int
 
 	ServerID int
 }
@@ -61,7 +61,7 @@ type upstream struct {
 
 type authorizedKey struct {
 	Key   keydata
-	KeyId int
+	KeyID int
 
 	DownstreamID int
 }

sshpiperd/upstream/database/mysql.go

@@ -5,7 +5,7 @@ import (
 
 	mysqldriver "github.com/go-sql-driver/mysql"
 	"github.com/jinzhu/gorm"
-	_ "github.com/jinzhu/gorm/dialects/mysql"
+	_ "github.com/jinzhu/gorm/dialects/mysql" // gorm dialiect
 
 	upstreamprovider "github.com/tg123/sshpiper/sshpiperd/upstream"
 )

sshpiperd/upstream/database/plugin.go

@@ -4,7 +4,6 @@ import (
 	"log"
 
 	"github.com/jinzhu/gorm"
-	_ "github.com/jinzhu/gorm/dialects/mysql"
 
 	upstreamprovider "github.com/tg123/sshpiper/sshpiperd/upstream"
 )

sshpiperd/upstream/database/postgres.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 
 	"github.com/jinzhu/gorm"
-	_ "github.com/jinzhu/gorm/dialects/postgres"
+	_ "github.com/jinzhu/gorm/dialects/postgres" // gorm dialect
 
 	upstreamprovider "github.com/tg123/sshpiper/sshpiperd/upstream"
 )

sshpiperd/upstream/database/sqlite.go

@@ -2,7 +2,7 @@ package database
 
 import (
 	"github.com/jinzhu/gorm"
-	_ "github.com/jinzhu/gorm/dialects/sqlite"
+	_ "github.com/jinzhu/gorm/dialects/sqlite" // gorm dialect
 
 	upstreamprovider "github.com/tg123/sshpiper/sshpiperd/upstream"
 )