diff --git a/3.Integration Test Plan Document/ITPD.lyx b/3.Integration Test Plan Document/ITPD.lyx
index 1539c13..0341e04 100644
--- a/3.Integration Test Plan Document/ITPD.lyx	
+++ b/3.Integration Test Plan Document/ITPD.lyx	
@@ -1818,7 +1818,7 @@ Authentication Manager
 \begin_layout Plain Layout
 
 \family typewriter
-register(User)
+register(Credentials)
 \end_layout
 
 \end_inset
@@ -1830,7 +1830,7 @@ register(User)
 
 \begin_layout Plain Layout
 \begin_inset Tabular
-<lyxtabular version="3" rows="4" columns="2">
+<lyxtabular version="3" rows="3" columns="2">
 <features tabularvalignment="middle">
 <column alignment="left" valignment="top">
 <column alignment="left" valignment="top" width="44col%">
@@ -1850,7 +1850,8 @@ Description
 \begin_inset Text
 
 \begin_layout Plain Layout
-This is a cool description
+This function creates a new entity user in the system with all the information
+ provided by the user.
 \end_layout
 
 \end_inset
@@ -1863,7 +1864,7 @@ This is a cool description
 \begin_layout Plain Layout
 
 \shape slanted
-Input
+Input 
 \end_layout
 
 \end_inset
@@ -1885,27 +1886,7 @@ Effect
 \begin_inset Text
 
 \begin_layout Plain Layout
-A null parameter
-\end_layout
-
-\end_inset
-</cell>
-<cell alignment="left" valignment="top" leftline="true" usebox="none">
-\begin_inset Text
-
-\begin_layout Plain Layout
-A NullArgumentException is raised.
-\end_layout
-
-\end_inset
-</cell>
-</row>
-<row topspace="1pt" bottomspace="2pt">
-<cell alignment="left" valignment="top" usebox="none">
-\begin_inset Text
-
-\begin_layout Plain Layout
-A non-null user
+A Credential object (name, surname, username, password, address..)
 \end_layout
 
 \end_inset