As this is the first plugin im coding, i have no idea how i am meant to take information from a player, example:
/info <player>, that it will take the playername and the give me information about the guy.
can anybody tell me how to do that?

You can always look in other plugins to get some additional info how to use some things in C#, Rust and uMod

We have just added documentation detailing the various properties and methods available through IPlayer

https://umod.org/documentation/umod/api/player

Thanks

If i want a "player" to be an argument, how do i do it, as player.Id; is my own id for example if i want to tp to another person. (i know there is a plugin for tp its just an example.)

Edit:
for example /tp <playername>,
that the player.Name; will detect that i mean the second argument (<playername>), i tried some stuff, it just didn't work.

IPlayer player = covalence.Players.FindPlayer ("Name");

IPlayer player = players.Find("Name");

Depends on whether you're using RustPlugin or CovalencePlugin

Edit:
Nevermind i found a fix for it, thanks anyways !:D


I've been trying something, i get this error
i can't understand what's wrong tho
the error:

Failed to call hook 'Cmd1' on plugin 'WarnSystem v0.1.8' (IndexOutOfRangeException: Index was outside the bounds of the array.)
  at Oxide.Plugins.WarnSystem.Cmd1 (Oxide.Core.Libraries.Covalence.IPlayer player, System.String cmd, System.String[] args) [0x00052] in <6de7740a3e824fe9bc8ec1ff7b4b3b40>:0
  at Oxide.Plugins.WarnSystem.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00063] in <6de7740a3e824fe9bc8ec1ff7b4b3b40>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0

You're trying to use an argument that doesn't exist; should be checking if it exists before using it.

Yea, i realized it a minute after. Thanks for helping anyways :D