Update with credentials for tutorial

book/04_NASA_Earthdata/0_Initial_Setup.md

@@ -7,10 +7,10 @@ To login to the 2i2c Hub, follow these simple steps:
 
 * Enter the 2i2c Hub prepared to this tutorial: https://climaterisk.opensci.2i2c.cloud/.
 
-* Enter your credentials: choose any username and the password will be share the previous day to the tutorial. One recommendation at the moment to choose a username is that use you GitHub username to avoid name collisions. 
+* Enter your credentials: choose any username and the password will be share the previous day to the tutorial. When choosing a username it is recommended that you 
+  use your GitHub username to avoid name collisions. 
 
-
-![2i2c_login](../assets/2i2c_login.png)
+111![2i2c_login](../assets/2i2c_login.png)
 
 
 Logging in maytake a few minutes if a new node needs to be created.