diff --git a/e621dl.py b/e621dl.py
index d39b802..175fa46 100755
--- a/e621dl.py
+++ b/e621dl.py
@@ -15,7 +15,7 @@
 if __name__ == '__main__':
     # Create the requests session that will be used throughout the run.
     with remote.requests_retry_session() as session:
-        # Set the user-agent. Requirements are specified at https://e621.net/help/show/api#basics.
+        # Set the user-agent. Requirements are specified at https://e621.net/wiki_pages/2425#Basics.
         session.headers['User-Agent'] = f"e621dl.py/{constants.VERSION} (by Wulfre)"
         
         # Check if a new version is released on github. If so, notify the user.
@@ -23,10 +23,6 @@
             print('A NEW VERSION OF e621dl IS AVAILABLE ON GITHUB AT https://github.com/Wulfre/e621dl/releases/latest.')
 
         print(f"[i] Running e621dl version {constants.VERSION}.")
-        print('')
-        print("[i] Checking for partial downloads...")
-
-        remote.finish_partial_downloads(session)
 
         print('')
         print("[i] Parsing config...")
@@ -36,9 +32,18 @@
         # Initialize the lists that will be used to filter posts.
         searches = []
 
-        # Initialize last_id
+        # Initialize last_id.
         last_id = None
 
+        # Initialize login information.
+        login = {
+            'username': config['login'].get('username'),
+            'api_key': config['login'].get('api_key')
+        }
+
+        if login['username'] or login['api_key'] == None:
+            print('[i] No login detected. Some posts may be hidden and unable to be downloaded.')
+
         # Initialize user configured options in case any are missing.
         default_days = config['default_search'].get('days', 1)
         default_score = config['default_search'].get('min_score', -0x7F_FF_FF_FF)
@@ -70,6 +75,10 @@
                 'earliest_date': section_date
             })
 
+        print('')
+        print("[i] Checking for partial downloads...")
+        remote.finish_partial_downloads(session)
+
         for search in searches:
             print('')
 
@@ -83,7 +92,7 @@
             # Sets up a loop that will continue indefinitely until the last post of a search has been found.
             while True:
                 print("[i] Getting posts...")
-                results = remote.get_posts(search_string, search['earliest_date'], last_id, session)['posts']
+                results = remote.get_posts(search_string, search['earliest_date'], last_id, login, session)['posts']
 
                 # Gets the id of the last post found in the search so that the search can continue.
                 try:
diff --git a/e621dl/constants.py b/e621dl/constants.py
index b2fb412..88e866a 100644
--- a/e621dl/constants.py
+++ b/e621dl/constants.py
@@ -4,7 +4,11 @@
 MAX_TAGS = 38
 PARTIAL_DOWNLOAD_EXT = 'request'
 
-DEFAULT_CONFIG_TEXT = '''default_search:
+DEFAULT_CONFIG_TEXT = '''login:
+    username:
+    api_key:
+
+default_search:
     days: 1
     min_score: 0
     min_favs: 0
diff --git a/e621dl/remote.py b/e621dl/remote.py
index c282ceb..edcb332 100644
--- a/e621dl/remote.py
+++ b/e621dl/remote.py
@@ -55,11 +55,13 @@ def get_github_release(session):
 
         return response.json()['tag_name'].strip('v')
 
-def get_posts(search_string, earliest_date, last_id, session):
+def get_posts(search_string, earliest_date, last_id, login, session):
     url = 'https://e621.net/posts.json'
     payload = {
         'limit': constants.MAX_RESULTS,
-        'tags': f"date:>={earliest_date} {search_string}"
+        'tags': f"date:>={earliest_date} {search_string}",
+        'login': login['username'],
+        'api_key': login['api_key']
     }
     
     if last_id: