I’m developing a dashboard and I need a login to reconcile with the user’s registration.
I followed these steps from Streamlit Docs:
Option 2: Individual password for each user
When using these steps I removed the part where it delete the st.session_state["username"], and then I realized that:
- It ran before I put the username or password.
- The layout was not so pretty.
So I changed it a bit and got the following code:
def check_password():
"""Returns `True` if the user had a correct password."""
if "password_correct" not in st.session_state:
st.session_state["password_correct"] = False
if st.session_state["password_correct"] == False:
col1, col2, col3 = st.columns([1.5,2,1.5])
with col2:
with st.form("Painel de Login"):
st.text_input("Username", key="username")
st.text_input("Password", type="password", key="password")
login = st.button("Login")
if login:
if (st.session_state["username"] in st.secrets["passwords"] and st.session_state["password"] == st.secrets["passwords"] [st.session_state["username"]]):
st.session_state["password_correct"] = True
else:
st.session_state["password_correct"] = False
st.error("😕 User not known or password incorrect")
if st.session_state["password_correct"] == True:
# Password correct.
return True
The code ran fine, but it didn’t save the st.session_state[“username”] variable.
So I changed it and left it like this:
def check_password():
"""Returns `True` if the user had a correct password."""
if "password_correct" not in st.session_state:
st.session_state["password_correct"] = False
if st.session_state["password_correct"] == False:
col1, col2, col3 = st.columns([1.5,2,1.5])
with col2:
with st.form("Painel de Login"):
if ["username"] not in st.session_state:
st.session_state.username = st.text_input("Username")
if ["password"] not in st.session_state:
st.session_state.password = st.text_input("Password", type="password")
login = st.form_submit_button("Login")
if login:
if (st.session_state["username"] in st.secrets["passwords"] and st.session_state["password"] == st.secrets["passwords"][st.session_state["username"]]):
st.session_state["password_correct"] = True
else:
st.session_state["password_correct"] = False
st.error("😕 User not known or password incorrect")
if st.session_state["password_correct"] == True:
# Password correct.
return True
That way, when the user logs into the dashboard, he saves the st.sessiont_state[“username”] but at first it keeps the login screen active, when I switch tabs it disappears.
After login:
After swithing tabs:
Some observations:
1.I already tried keeping the password_entered() function and making a callback on the st.form_submit_button
2.I already changed the if st.session_state["username"] == True to elif st.session_state["username"] == True or else.
3.I already changed the if st.session_state["username"] == False to if not st.session_state["username"]
In all these attempts, the result was that the problem of appearing the login box solved, but I needed to give 2 clicks on the Login button, and if the user made a mistake in the username, it did not correct the second time.
The only way that seems to work best is to declare the st.session_state["username"] using the key form and using the callback in st.form_submit_button:
def check_password():
"""Returns `True` if the user had a correct password."""
def password_entered():
"""Checks whether a password entered by the user is correct."""
if (
st.session_state["username"] in st.secrets["passwords"]
and st.session_state["password"]
== st.secrets["passwords"][st.session_state["username"]]
):
st.session_state["password_correct"] = True
else:
st.session_state["password_correct"] = False
st.error("😕 User not known or password incorrect")
if "password_correct" not in st.session_state:
st.session_state["password_correct"] = False
if st.session_state["password_correct"] == False:
col1, col2, col3 = st.columns([1.5,2,1.5])
with col2:
with st.form("Painel de Login"):
st.text_input("Username", key="username")
st.text_input("Password", type="password", key="password")
login = st.form_submit_button("Login", on_click=password_entered)
else:
return True
But this way, when I switch tabs it deletes the st.session_state["username"].
After Login:
After Switch Tabs:
