diff --git a/crates/frontend/js-components/lib/create-addressbook-form.ts b/crates/frontend/js-components/lib/create-addressbook-form.ts
index 8c99f84..172b3ef 100644
--- a/crates/frontend/js-components/lib/create-addressbook-form.ts
+++ b/crates/frontend/js-components/lib/create-addressbook-form.ts
@@ -38,7 +38,12 @@ export class CreateAddressbookForm extends LitElement {
         <form @submit=${this.submit} ${ref(this.form)}>
           <label>
             principal (for group addressbooks)
-            <input type="text" name="principal" value=${this.user} @change=${e => this.principal = e.target.value} />
+            <select name="principal" value=${this.user} @change=${e => this.principal = e.target.value}>
+              <option value=${this.user}>${this.user}</option>
+              ${window.rusticalUser.memberships.map(membership => html`
+                <option value=${membership}>${membership}</option>
+              `)}
+            </select>
           </label>
           <br>
           <label>
diff --git a/crates/frontend/js-components/lib/create-calendar-form.ts b/crates/frontend/js-components/lib/create-calendar-form.ts
index c1fd0e7..2584726 100644
--- a/crates/frontend/js-components/lib/create-calendar-form.ts
+++ b/crates/frontend/js-components/lib/create-calendar-form.ts
@@ -45,8 +45,13 @@ export class CreateCalendarForm extends LitElement {
         <h3>Create calendar</h3>
         <form @submit=${this.submit} ${ref(this.form)}>
           <label>
-            principal (for group calendar)
-            <input type="text" name="principal" value=${this.user} @change=${e => this.principal = e.target.value} />
+            principal (for group calendars)
+            <select name="principal" value=${this.user} @change=${e => this.principal = e.target.value}>
+              <option value=${this.user}>${this.user}</option>
+              ${window.rusticalUser.memberships.map(membership => html`
+                <option value=${membership}>${membership}</option>
+              `)}
+            </select>
           </label>
           <br>
           <label>
diff --git a/crates/frontend/js-components/lib/delete-button.ts b/crates/frontend/js-components/lib/delete-button.ts
index 2a55496..ee0b167 100644
--- a/crates/frontend/js-components/lib/delete-button.ts
+++ b/crates/frontend/js-components/lib/delete-button.ts
@@ -1,6 +1,5 @@
 import { html, LitElement } from "lit";
 import { customElement, property } from "lit/decorators.js";
-import { createClient } from "webdav";
 
 @customElement("delete-button")
 export class DeleteButton extends LitElement {
diff --git a/crates/frontend/js-components/lib/global.d.ts b/crates/frontend/js-components/lib/global.d.ts
new file mode 100644
index 0000000..9939bdb
--- /dev/null
+++ b/crates/frontend/js-components/lib/global.d.ts
@@ -0,0 +1,9 @@
+interface Window {
+  rusticalUser: {
+    id: String,
+    displayname: String | null,
+    memberships: Array<String>,
+    principal_type: "individual" | "group" | "room" | String
+  }
+}
+
diff --git a/crates/frontend/public/assets/js/create-addressbook-form.mjs b/crates/frontend/public/assets/js/create-addressbook-form.mjs
index 5fbc49d..aae9eb0 100644
--- a/crates/frontend/public/assets/js/create-addressbook-form.mjs
+++ b/crates/frontend/public/assets/js/create-addressbook-form.mjs
@@ -35,7 +35,12 @@ let CreateAddressbookForm = class extends i {
         <form @submit=${this.submit} ${n(this.form)}>
           <label>
             principal (for group addressbooks)
-            <input type="text" name="principal" value=${this.user} @change=${(e2) => this.principal = e2.target.value} />
+            <select name="principal" value=${this.user} @change=${(e2) => this.principal = e2.target.value}>
+              <option value=${this.user}>${this.user}</option>
+              ${window.rusticalUser.memberships.map((membership) => x`
+                <option value=${membership}>${membership}</option>
+              `)}
+            </select>
           </label>
           <br>
           <label>
diff --git a/crates/frontend/public/assets/js/create-calendar-form.mjs b/crates/frontend/public/assets/js/create-calendar-form.mjs
index 2fdb84a..47a2332 100644
--- a/crates/frontend/public/assets/js/create-calendar-form.mjs
+++ b/crates/frontend/public/assets/js/create-calendar-form.mjs
@@ -38,8 +38,13 @@ let CreateCalendarForm = class extends i {
         <h3>Create calendar</h3>
         <form @submit=${this.submit} ${n(this.form)}>
           <label>
-            principal (for group calendar)
-            <input type="text" name="principal" value=${this.user} @change=${(e2) => this.principal = e2.target.value} />
+            principal (for group calendars)
+            <select name="principal" value=${this.user} @change=${(e2) => this.principal = e2.target.value}>
+              <option value=${this.user}>${this.user}</option>
+              ${window.rusticalUser.memberships.map((membership) => x`
+                <option value=${membership}>${membership}</option>
+              `)}
+            </select>
           </label>
           <br>
           <label>
diff --git a/crates/frontend/public/templates/pages/user.html b/crates/frontend/public/templates/pages/user.html
index 8b9ea6c..b5de34b 100644
--- a/crates/frontend/public/templates/pages/user.html
+++ b/crates/frontend/public/templates/pages/user.html
@@ -1,6 +1,10 @@
 {% extends "layouts/default.html" %}
 
 {% block imports %}
+<template id="data-rustical-user">{{ user|json }}</template>
+<script>
+window.rusticalUser = JSON.parse(document.querySelector('#data-rustical-user').innerHTML)
+</script>
 <script type="module" src="/frontend/assets/js/create-calendar-form.mjs" async></script>
 <script type="module" src="/frontend/assets/js/create-addressbook-form.mjs" async></script>
 <script type="module" src="/frontend/assets/js/delete-button.mjs" async></script>
diff --git a/crates/store/src/auth/principal.rs b/crates/store/src/auth/principal.rs
index a022c42..b52ee18 100644
--- a/crates/store/src/auth/principal.rs
+++ b/crates/store/src/auth/principal.rs
@@ -25,6 +25,7 @@ pub struct Principal {
     pub displayname: Option<String>,
     #[serde(default)]
     pub principal_type: PrincipalType,
+    #[serde(skip_serializing)]
     pub password: Option<Secret<String>>,
     #[serde(default)]
     pub memberships: Vec<String>,