use pip to install certbot into user environemnt

defaults/main.yml

@@ -1,4 +1,5 @@
 ---
+# @var certbot_packages_extra: Extra packages to install with pip (e.g. DNS plugins)
 certbot_packages_extra: []
 
 certbot_user: root

tasks/install.yml

@@ -1,21 +1,19 @@
 ---
-- block:
+- name: Create certbot user '{{ certbot_user }}'
-    - name: Install certbot
-      package:
-        name: "{{ item }}"
-        state: present
-      loop: "{{ certbot_packages_extra + __certbot_packages }}"
-
-    - name: Create certbot user '{{ certbot_user }}'
   user:
     name: "{{ certbot_user }}"
   become: True
   become_user: root
   when: not certbot_user == 'root'
-  become: True
-  become_user: root
 
 - block:
+  - name: Install certbot with pip
+    pip:
+      name: "{{ item }}"
+      executable: pip3
+      extra_args: --user
+    loop: "{{ certbot_packages_extra + __certbot_packages }}"
+
     - name: Create certbot environment
       file:
         path: "{{ item.name }}"