chore(api): support ignore password if login source type is LDAP for creating user API (#28491) (#28525)

Backport #28491 by @appleboy

- Modify the `Password` field in `CreateUserOption` struct to remove the
`Required` tag
- Update the `v1_json.tmpl` template to include the `email` field and
remove the `password` field

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Co-authored-by: Bo-Yi Wu <appleboy.tw@gmail.com>
(cherry picked from commit 411310d698)

modules/structs/admin_user.go

@@ -16,8 +16,7 @@ type CreateUserOption struct {
 	// required: true
 	// swagger:strfmt email
 	Email              string `json:"email" binding:"Required;Email;MaxSize(254)"`
-	// required: true
-	Password           string `json:"password" binding:"Required;MaxSize(255)"`
+	Password           string `json:"password" binding:"MaxSize(255)"`
 	MustChangePassword *bool  `json:"must_change_password"`
 	SendNotify         bool   `json:"send_notify"`
 	Restricted         *bool  `json:"restricted"`

routers/api/v1/admin/user.go

@@ -93,11 +93,20 @@ func CreateUser(ctx *context.APIContext) {
 	if ctx.Written() {
 		return
 	}
+
+	if u.LoginType == auth.Plain {
+		if len(form.Password) < setting.MinPasswordLength {
+			err := errors.New("PasswordIsRequired")
+			ctx.Error(http.StatusBadRequest, "PasswordIsRequired", err)
+			return
+		}
+
 		if !password.IsComplexEnough(form.Password) {
 			err := errors.New("PasswordComplexity")
 			ctx.Error(http.StatusBadRequest, "PasswordComplexity", err)
 			return
 		}
+
 		pwned, err := password.IsPwned(ctx, form.Password)
 		if pwned {
 			if err != nil {
@@ -106,6 +115,7 @@ func CreateUser(ctx *context.APIContext) {
 			ctx.Error(http.StatusBadRequest, "PasswordPwned", errors.New("PasswordPwned"))
 			return
 		}
+	}
 
 	overwriteDefault := &user_model.CreateUserOverwriteOptions{
 		IsActive: util.OptionalBoolTrue,

templates/swagger/v1_json.tmpl

@@ -18596,8 +18596,7 @@
       "type": "object",
       "required": [
         "username",
-        "email",
-        "password"
+        "email"
       ],
       "properties": {
         "created_at": {