diff --git a/conf/user_getmail.py b/conf/user_getmail.py
new file mode 100644
index 0000000..1930a7f
--- /dev/null
+++ b/conf/user_getmail.py
@@ -0,0 +1,4 @@
+import sys, json
+for i in json.loads(sys.stdin.readlines()[0])["Users"]:
+  if i["Username"] == sys.argv[1]:
+    print i["Mail"]
\ No newline at end of file
diff --git a/conf/user_getname.py b/conf/user_getname.py
new file mode 100644
index 0000000..852371b
--- /dev/null
+++ b/conf/user_getname.py
@@ -0,0 +1,4 @@
+import sys, json
+for i in json.loads(sys.stdin.readlines()[0])["Users"]:
+  if i["Username"] == sys.argv[1]:
+    print i["Fullname"]
\ No newline at end of file
diff --git a/conf/user_list.py b/conf/user_list.py
new file mode 100644
index 0000000..52994aa
--- /dev/null
+++ b/conf/user_list.py
@@ -0,0 +1,3 @@
+import sys, json
+userlist=json.loads(sys.stdin.readlines()[0])["Users"]
+print "{0}".format("\n".join(i["Username"] for i in userlist))
diff --git a/manifest.json b/manifest.json
index 6a211b4..4e8cc00 100644
--- a/manifest.json
+++ b/manifest.json
@@ -34,6 +34,19 @@
                 },
                 "choices": ["Yes", "No"],
                 "default": "Yes"
+            },
+            {
+                "name": "admin",
+                "ask": {
+                    "en": "Admin user (must be an existing Yunohost user login)"
+                },
+                "default": "homer"
+            },
+            {
+                "name": "password",
+                "ask": {
+                    "en": "Admin user password"
+                }
             }
         ]
     }
diff --git a/scripts/install b/scripts/install
index b6e9c83..7f99233 100644
--- a/scripts/install
+++ b/scripts/install
@@ -4,11 +4,20 @@
 domain=$1
 path=$2
 is_public=$3
+admin=$4
+password=$5
 
 # Check domain/path availability
 sudo yunohost app checkurl $domain$path -a ghostblog
 if [[ ! $? -eq 0 ]]; then
-  exit 1
+    exit 1
+fi
+
+# Check that admin user is an existing account
+sudo yunohost user list | python ../conf/user_list.py | grep "^$admin$" >/dev/null
+if [[ ! $? -eq 0 ]]; then
+    echo "Error : the chosen admin user does not exist"
+    exit 1
 fi
 
 echo "Install dependencies..."
@@ -74,10 +83,27 @@ sudo update-rc.d ynh-ghostblog defaults
 sudo service ynh-ghostblog start
 sudo yunohost app service ynh-ghostblog -l $logfile
 
+echo "Setting up logrotate configuration..."
 sed -i "s@YNH_LOGFILE@$logfile@g" ../conf/logrotate
 sudo cp ../conf/logrotate /etc/logrotate.d/ynh-ghostblog
 
 echo "Reloading Nginx..."
-
 sudo service nginx reload
 sudo yunohost app ssowatconf
+
+echo "Registering admin..."
+admin_name=$(sudo yunohost user list | python ../conf/user_getname.py $admin)
+admin_mail=$(sudo yunohost user list | python ../conf/user_getmail.py $admin)
+curl -kL -X GET https://$domain$path/ghost/signup --cookie-jar cookie.txt > signup_get
+csrf_token=$(cat signup_get | egrep csrf-param | egrep "content=\".+\"" -o | egrep "\".+\"" -o | cut -d '"' -f 2)
+curl -kL -X POST https://$domain$path/ghost/signup/ \
+  --cookie cookie.txt  --header "X-CSRF-Token: $csrf_token" \
+  --data-urlencode "name=$admin_name" \
+  --data-urlencode "email=$admin_mail" \
+  --data-urlencode "password=$password" \
+  > /dev/null 2>&1
+sudo yunohost app setting ghostblog admin -v $admin
+sudo yunohost app setting ghostblog password -v $password
+
+
+echo "Success ! You can go to https://$domain$path/ghost to write your posts"