This is a combination of 4 commits.

Fix the image

internal/helpers/hash/hash.go

@@ -0,0 +1,14 @@
+package hash
+
+import "golang.org/x/crypto/bcrypt"
+
+func HashPassword(password string, cost int) (string, error) {
+	bytes, err := bcrypt.GenerateFromPassword([]byte(password), cost)
+	return string(bytes), err
+}
+
+func CheckPasswordHash(password, hash string) bool {
+    err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+    return err == nil
+}
+

internal/helpers/hash/hash_test.go

@@ -0,0 +1,21 @@
+package hash_test
+
+import (
+	"testing"
+
+	"git.badhouseplants.net/softplayer/softplayer-backend/internal/helpers/hash"
+	"github.com/alecthomas/assert/v2"
+)
+
+func TestHashValid(t *testing.T) {
+    password := "qwertyu9"
+    hpass, err := hash.HashPassword(password, 10)
+    assert.NoError(t, err)
+    assert.True(t, hash.CheckPasswordHash(password, hpass))
+}
+
+func TestHashInvalid(t *testing.T) {
+    password := "qwertyu9"
+    invhash := "qwertyu9"
+    assert.False(t, hash.CheckPasswordHash(password, invhash))
+}