Update encoding section, fix credits.

.editorconfig

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+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+indent_style = space
+indent_size = 4
+
+charset = utf-8
+
+[*.yaml]
+indent_size = 2
+
+[*.yml]
+indent_size = 2

docs/endpoints/levels/download_level.md

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+# Download Level
+
+*Downloads a level and related information.*
+
+## Parameters
+
+| name             | description                                                                           |
+|------------------|---------------------------------------------------------------------------------------|
+| `levelID`        | The ID of the level to download. See [special level IDs][special_level_ids] for more. |
+| `secret`         | The [common secret][secrets].                                                         |
+| `gameVersion`?   | The current [game version][versions].                                                 |
+| `binaryVersion`? | The current [binary version][versions].                                               |
+| `gdw`?           | Whether the level is in *Geometry Dash World*.                                        |
+| `accountID`?     | The account ID of the user downloading the level.                                     |
+| `gjp`?           | The [encoded password][passwords] of the user downloading the level.                  |
+| `udid`?          | The [UDID][udid] of the user who is downloading the level.                            |
+| `uuid`?          | The [UUID][uuid] of the downloading the level.                                        |
+| `inc`?           | Unknown functionality. Set to `1`.                                                    |
+| `extras`?        | Unknown functionality. Set to `0`.                                                    |
+| `rs`?            | Random string. See [here][random_string].                                             |
+| `chk`?           | Check. See [here][download_level].                                                    |
+
+## Response
+
+Returns a [level][levels].
+
+## Example
+
+### Code
+
+```python
+import requests
+
+# with this code we are getting the level Test by DevExit
+
+data = {
+    "levelID": 62687277,      # level ID
+    "secret": "Wmfd2893gb7",  # common secret
+}
+
+response = requests.post("http://boomlings.com/database/downloadGJLevel22.php", data=data)
+
+print(response.text)
+```
+
+### Output
+
+```console
+1:62687277:2:Test:3:QSB0ZXN0IGxldmVsIGZvciB0aGUgR0QgRG9jcyE=:4:H4sIAAAAAAAAC6WQwQ3DIAxFF3IlfxsIUU6ZIQP8AbJChy_GPSZqpF7-A4yfDOfhXcCiNMIqnVYrgYQl8rDwBTZCVbkQRI3oVHbiDU6F2jMF_lesl4q4kw2PJMbovxLBQxTpM3-I6q0oHmXjzx7N0240cu5w0UBNtESRkble8uSLHjh8nTubmYJZ2MvMrEITEN0gEJMxlLiMZ28frmj:5:1:6:3935672:8:0:9:0:10:1:12:0:13:21:14:0:17::43:0:25::18:0:19:0:42:0:45:1:15:0:30:55610687:31:0:28:1 hour:29:1 hour:35:546561:36::37:0:38:0:39:50:46::47::40::27:AQcHBwEL#1bae6491cc87c72326abcbc0a7afaee139aa7088#f17c5a61f4ba1c7512081132459ddfaaa7c6f716
+```
+
+[special_level_ids]: /resources/server/special_level_ids
+[secrets]: /resources/server/secrets
+[versions]: /resources/server/versions
+[passwords]: /resources/server/passwords
+
+[levels]: /resources/server/levels
+
+[udid]: /topics/encoding/ids#udid
+[uuid]: /topics/encoding/ids#uuid
+[random_string]: /topics/encoding/ids#random-string
+[download_level]: /topics/encoding/checks#download-level

docs/endpoints/messages/delete_message.md

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+# Delete Message
+
+*Deletes a message between two users.*
+
+## Endpoint
+
+| method | endpoint                 |
+|--------|--------------------------|
+| `POST` | `deleteGJMessages20.php` |
+
+## Parameters
+
+| name             | description                                                         |
+|------------------|---------------------------------------------------------------------|
+| `accountID`      | The account ID of the user who is deleting the message.             |
+| `gjp`            | The [encoded password][passwords] of the user deleting the message. |
+| `messageID`      | The ID of the message being deleted.                                |
+| `secret`         | The [common secret][secrets].                                       |
+| `isSender`?      | Whether the user is the sender.                                     |
+| `gameVersion`?   | The current [game version][versions].                               |
+| `binaryVersion`? | The current [binary version][versions].                             |
+| `gdw`?           | Whether the message is in *Geometry Dash World*.                    |
+
+## Response
+
+Always returns `1`, regardless of whether the message was deleted or not.
+
+## Example
+
+### Code
+
+```python
+import requests
+
+# with this code, DevExit is deleting one of her recievied messages
+
+data = {
+    "accountID": 173831,      # DevExit's account ID
+    "gjp": "********",        # this would be DevExit's encoded password
+    "messageID": 3141592,     # message ID
+    "secret": "Wmfd2893gb7",  # common secret
+}
+
+response = requests.post("http://boomlings.com/database/deleteGJMessages20.php", data=data)
+
+print(response.text)
+```
+
+### Output
+
+```console
+1
+```
+
+[passwords]: /resources/server/passwords
+[secrets]: /resources/server/secrets
+[versions]: /resources/server/versions

docs/topics/encoding/aes.md

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+# AES

docs/topics/encoding/base64.md

@@ -1,10 +1,85 @@
 # Base64
 
-[Base64][Base64] encoding is widely used amongst different endpoints in Geometry Dash.
+[Base64][base64] encoding is widely used amongst different endpoints in Geometry Dash.
 
 It is used to encode fields like level data, level descriptions, comments, etc.
 
 GD uses *URL-safe* Base64 encoding, which uses `[A-Z]` and `[a-z]` letters
 along with `_` and `-` as special characters.
 
-[Base64]: https://en.wikipedia.org/wiki/Base64
+## Code
+
+```python
+# taken from gd.py
+
+from base64 import b64decode as standard_decode_base64
+from base64 import b64encode as standard_encode_base64
+from base64 import urlsafe_b64decode as standard_decode_base64_url_safe
+from base64 import urlsafe_b64encode as standard_encode_base64_url_safe
+
+# encoding
+
+DEFAULT_ENCODING = "utf-8"
+DEFAULT_ERRORS = "strict"
+
+# padding
+
+BASE64_PAD = 4
+BASE64_INVALID_TO_PAD = 1
+BASE64_PADDING = b"="
+
+
+def enforce_valid_base64(data: bytes) -> bytes:
+    required = len(data) % BASE64_PAD
+
+    if required:
+        if required == BASE64_INVALID_TO_PAD:
+            data = data[:LAST]
+
+        else:
+            data += BASE64_PADDING * (BASE64_PAD - required)
+
+    return data
+
+
+def decode_base64(data: bytes) -> bytes:
+    return standard_decode_base64(enforce_valid_base64(data))
+
+
+def encode_base64(data: bytes) -> bytes:
+    return standard_encode_base64(data)
+
+
+def decode_base64_url_safe(data: bytes) -> bytes:
+    return standard_decode_base64_url_safe(enforce_valid_base64(data))
+
+
+def encode_base64_url_safe(data: bytes) -> bytes:
+    return standard_encode_base64_url_safe(data)
+
+
+def decode_base64_string(
+    string: str, encoding: str = DEFAULT_ENCODING, errors: str = DEFAULT_ERRORS
+) -> str:
+    return decode_base64(string.encode(encoding, errors)).decode(encoding, errors)
+
+
+def encode_base64_string(
+    string: str, encoding: str = DEFAULT_ENCODING, errors: str = DEFAULT_ERRORS
+) -> str:
+    return encode_base64(string.encode(encoding, errors)).decode(encoding, errors)
+
+
+def decode_base64_string_url_safe(
+    string: str, encoding: str = DEFAULT_ENCODING, errors: str = DEFAULT_ERRORS
+) -> str:
+    return decode_base64_url_safe(string.encode(encoding, errors)).decode(encoding, errors)
+
+
+def encode_base64_string_url_safe(
+    string: str, encoding: str = DEFAULT_ENCODING, errors: str = DEFAULT_ERRORS
+) -> str:
+    return encode_base64_url_safe(string.encode(encoding, errors)).decode(encoding, errors)
+```
+
+[base64]: https://en.wikipedia.org/wiki/Base64